giúp em với 
 
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Exercise 5. Put the verb into the correct first conditional form.
1. If we (use)
cleaner.
..............public transport more regularly, our cities (become)
2. If global warming (keep).
3. (Take).
4. If we (waste)
.............. on getting worse, sea levels (rise)
a shower and we (save).................. a lot of water.
6. If you (recycle).
5. Polar bears (lose)
electricity, we (not save)
7. What (happen)
as much as you can, you (help)
their habitat if sea levels (rise)..
sources of energy.
the environment.
if we (stop)
8. If 1 (use).
reusable bags, it (help)
polluting the air?
the environment.
9. If technology (get)
better, we (use)
more renewable energy.
10. Air quality (not be)
better unless we (plant)
more trees.
Exercise 6. Underline the correct answers.
1. Unless you eat/eats something, you won't have/will have enough energy to do the test.
2. Rooney doesn't catch / won't catch the bus if he will get/gets up late.
3. If you do not get / won't get out of here, I call/ will call the guards.
4. I go/will go on holiday near the sea if I have/ will have some days off.
5. If you go / will go to the market, your sister will cook / cooks lunch.
6. Trang will buy / buys a new car if she will have / has enough money.
7. You do not get / won't get a better job if you don't have / won't have required
qualifications.
8. My friend moves / will move to Ho Chi Minh City if she will get /gets a new job.
9. If we travel/ will travel to Australia, we visit / will visit the Opera House.
10. If you don't lock / won't lock the door carefully, someone steal / will steal precious
properties in your house.
Exercise 7. Choose the correct answers.
1.
apple a day keeps
A. An/Ø
B. An/the
doctor away.
C. An/a
D. The/the