Open the brackets using Present Simple or Future Simple Tenses.

1. She (to see) her brother when he (to return) from England.

2. If he (to go) to the airport by car, he (to catch) a plane.

3. It is raining. As soon as we (to go) out we (to get) wet.

4. When my mother (to go) shopping, she (to buy) some bread.

5. You (to worry) if your children (to be) late tonight?

6. When she (to go) out, she (to switch) off the light.

7. You (to recognize) him when she (to see) him again?

8. You (to phone) me after you (to come)? 9. If there (not to be) coffee, I (to get) some from the shop.

10.They (to be) surprised if they (not to get) this job.

11. I (to think) Peter (to be) very glad if we (to tell) him news.

12. We (to go) to the theatre next week? — I (to go) there if I (not to be) busy.

13. She (to return) home till 7 o’clock? — She (to return) when she (to finish) her work.

14. What he (to do) now? — He (to write) a letter to his friend who (to live) in France.

15. Don’t forget to lock the door after you (to leave).

16. Could you look after my child while I (to be) out.

17. She (not to start) supper until her husband (to return).

18. You (to go) for a walk at 2 o’clock? — I (not to go) until mother (to come).

Ex. 4

Choose between Future Simple and “be going to” to complete the conversation.

— Can I speak to Fiona, please?

— Speaking. Is that you, Pat?

— It’s me. Hi. What you ______________ (1 – do) tonight?

— I don’t know yet. I think, I _____________ (2 — read) the book Nora gave me yesterday.

— How about going to the cinema?

— Sounds good, but I’m looking after my little brother after eight, because my parents are going to their friend’s birthday party.

— Poor you. Your brother is so naughty sometimes!

— But I love him. He’s so funny! I think, he _______________ (3 — be) a good clown. He says he ______________ (4 — be) a pilot, nothing else. Well, what ______________ (5 — do) you tonight?

— I don’t know either. I wanted to go somewhere nice with you, but you are baby-sitting tonight, so I __________ (6 — help) you to baby-sit, if you don’t mind.

Of course, I don’t. Come along and we___________ (7 — have) a nice cup of tea and _________ (8—play) with my brother.

Ex. 5

Choose between Future Simple and “be going to”

1. A: Have you finished your essay yet?
B: No, but I'm sure I ..... (finish) it on time.

2. A: I have decided what to wear for the party.
B: Really? What ..........(wear), then?

3. A: Why do you need hot soapy water?
B: Because I.......... (wash) the car.

4. A: Did you post those letters?
B: No, I forgot. I.........(post) them this afternoon.

5. A: Did you book a table at the restaurant?
B: Yes, but I don't expect it...........(be) busy.

6. A: I'm hungry.
B: Me too. I.......... (make) us something to eat.

7. A: What are you doing this weekend?
B: Oh, I..........(probably/visit) my grandparents.

8. A: Look at that dog!
B: Oh yes! It ............(swim) across the river.

9. A: Tony is nearly eighteen, isn't he?
B: Yes. He ...............(work) for his father when he leaves school.

10. A: Are you going into town today?
B: Yes. I...........(give) you a lift if you like.

11. A: Your shirt is dirty.
B: Oh dear! I............(change) into another one.

12. A: I hope we ............(not/arrive) late for the meeting.
B: Don't worry. There's plenty of time.

13. A: I'm really thirsty after all that hard work.
B: I............(make) some tea.

14. A: Did you give Steve his present?
B: No. I ............(give) it to him tonight at dinner.

15. A: Watch out! You............... (bang) your head on the doorframe.
B: Oh! I didn't realise it was so low.

Unit 4

Topic: Biochemistry

Grammar: Present Progressive (Continuous) Tense

Do you know the subject of biochemistry?

What is a biomolecule?

What kind of biomolecules do you know?

What is DNA?

Read the text about biochemistry and translate it.

Biological chemistry

Biochemistry, sometimes called biological chemistry, is the study of chemical processes in living organisms, including, but not limited to, living matter. Biochemistry governs all living organisms and living processes. By controlling information flow through biochemical signaling and the flow of chemical energy through metabolism, biochemical processes give rise to the incredible complexity of life.

Much of biochemistry deals with the structures and functions of cellular

components such as proteins, carbohydrates, lipids, nucleic acids and other biomolecules although increasingly processes rather than individual molecules are the main focus. Over the last 40 years biochemistry has become so successful at explaining living processes that now almost all areas of the life sciences from botany to medicine are engaged in biochemical research. Today the main focus of pure biochemistry is in understanding how biological molecules give rise to the processes that occur within living cells which in turn relates greatly to the study and understanding of whole organisms.

Among the vast number of different biomolecules, many are complex and large molecules (called biopolymers), which are composed of similar repeating subunits (called monomers). Each class of polymeric biomolecule has a different set of subunit types. For example, a protein is a polymer whose subunits are selected from a set of 20 or more amino acids. Biochemistry studies the chemical properties of important biological molecules, like proteins, and in particular the chemistry of enzyme-catalyzed reactions.

The biochemistry of cell metabolism and the endocrine system has been extensively described. Other areas of biochemistry include the genetic code (DNA, RNA), protein synthesis, cell membrane transport, and signal transduction.

Researchers in biochemistry use specific techniques native to biochemistry, but increasingly combine these with techniques and ideas from genetics,

molecular biology and biophysics. There has never been a hard-line between these disciplines in terms of content and technique. Today the terms molecular biology and biochemistry are nearly interchangeable.

Vocabulary

amino acid in terms of

biopolymer interchangeable

cell membrane lipids

transport living matter

complex (adj) metabolism

endocrine system monomer

engage (v) nucleic acid

enzyme-catalyzed occur (v)

reaction protein

give rise to (v) subunit

govern (v) transduction

2. Fill in the gaps in this sentences:

1) Biochemistry is the study of ______ in living organisms.

2) Much of biochemistry deals with ______of cellular components such as ________.

3) Over the last ______ years biochemistry has become so successful at explaining living processes.

4) Today the main focus of pure biochemistry is in ______ how biological molecules give rise to the processes that ______within living cells.

5) Each class of polymeric ______ has a different set of subunit types.

6) ______ is a polymer whose subunits are se lected from a set of 20 or more amino acids.

7) The biochemistry of cell ______and the ______system has been extensively described.

8) Researchers in biochemistry use specific ______ native to biochemistry.

9) Today the terms _______and biochemistry are nearly interchangeable.

3. Make sentences in English with words stated below:

a) govern, give rise to, engage, occur;

b) protein, amino acid, carbohydrates, lipid, amino acid, endocrine system.

4. Answer the questions to check your comprehension.

1. What does biochemistry study?

2. What does biochemistry deal with?

3. What is a monomer?

5. Prepare a report about the role of biochemistry in modern life. Include the following ideas:

• What is biochemistry;

• What is biomolecule and what is its importance;

• The application of biochemistry in modern life.

Be ready to tell your report to your class.