1. If we ( keep on ) using more and more motor vehicles, we (run out) of oil 

2. If we ( run out) of oil, we (need) other kind of energy. 

3. If we (use) more oil and coal, pollution (increase). 

4. If pollution (increase), more and more trees (die). 

5. If more and more trees (die), the climate (change) 

6. If the climate change), we meet) with natural disasters. 

7. If we( try) to control pollution, it (be) very expensive 

9 If you (want) to speak English fluently, you (must/ practice)it more often.

10 He (pass)the exam if he (study) hard. 

11. If he invite) me, I'll accept. 

12.What you (do) if she refuses your invitation?.

13.If I (be) free, I'll visit you. 

14.He'll be late for school if he (not get) up early. 

15.If he (read) in bad light, he'll ruin his eyes. 

16.If he (take)my advice, everything can go well.

Bạnhãyviếtlạicáccâusau, và chia cácđộngtừtrongngoặctheothìđúng: present simple hoặc will/ won't.
a. If we (keep on)……..using more and more motor vehicles, we (run out)………… of oil.
b. If we (run out)………… of oil, we (need)……………… other kind of energy.
c. If we (use)…………. more oil and coal, pollution (increase)…………..
d. If pollution (increase)………………, more and more trees……………. (die).
e. If more and more trees (die)…………, the climate….. ….(change).
f. If the climate (change)………, we (meet)………….with natural disasters.
g. If we (try)……..to control pollution, it (be)………….. very expensive.
h. But if we (not control)……………..pollution, it (be)…………… too late.

@Nguyễn Nhật Minh @Hồ Bảo Trâm

BÀI 1 .REWRITE THESE SENTENCES BY USING CONDITIONAL SENTENCE TYPE 1 (câu điều kiện loại 1)

1.Stay here and you will feel save .

If ....................................................

2.Pay electricity bill today or your electricity will be cut off .

If..............................................................................................

3.Stop smoking other wise your cough may be worse.

If.................................................................................

4.Unless we use less fossil fuel , they will be run out soon .

If...........................................................................................

5.Unless it stops raining today , we may be faced with a serious flood .

If.............................................................................................................

6.Do morning exercises regularly and your body will be fitter.

If..................................................................................................

7.Unless we renewable energy , we will have notthing for the future generation.

If.............................................................................................................................

8.The climate will change unless we reduce the use of non - renewable energy

If............................................................................................................................

9.Lock all the doors and noone can break into your house.

If.........................................................................................

10.Unless we continue hunting polar bears , they will become extinct in near future.

If.............................................................................................................................

XVI. Find a mistake in the four underlined parts of each sentence and correct it.

1. If we keep on using more and more cars, we are running out of oil.

                   A                        B                                      C                      D

2. We should reuse and recycling bottles and cans to reduce garbage.

                         A                   B                      C                    D

3. People collect the broken glass and sending it to the factories.

                     A               B                             C                         D

4. If there will be too much exhaust fume in the air, our breathing will be badly

                     A                              B                                          C                     D

affected.

5. Reusable bags are good because they make of natural materials.

                               A                 B                   C              D

Read the passage below and an answer the question .we can develop alternative sources of energy,and unless we'll never succeed.instead of burning fossil fuels we should be concentrating on more economic uses of electricity because electricity can be produced from any source of energy. If we didn't waste so much energy,our resources would last longer. We can save more energy by conservativation than we can produce for the same money. Unless we do research on solar energy wind power tidal power hydroelectric plants.... Our fossil fuels will run out and we'll all freeze starve to dealth . Many countries are spending much more time and money on research because the energy from the sun the waves and the winds last forever.we really won't survive unless we start working on cleaner safer scour of energy . 1 can electricity be produced from any sources of energy?2 what would happen if we didn't waste so much energy?3 why are many countries spending much more time and money doing research on energy from the sun the waves and the wind?4 what will happen unless we start working on cleanr and safer sources of energy

VII . Fill in the blank in the following passage with ONE suitable word from the box :

students ; bulbs ; coal ; off ; rural ; electricity ; natural ; energy ; save ; wastes .

With the development of science and technology , more and more (1)......... is used every day . Nowadays , many (2)............. areas in Vietnam have been electrified , and more (3).............. is needed . If everyone (4) .............. energy , it will quickly run out , (5)............ at school should learn how to (6)......... energy , for example , they should turn (7)............... the electric lights when they leave their classrooms .

Moreover , we may waste electricity at home if we use a lot of light (8).............. By not wasting energy , we will save a lot of (9) ................. resources , such as (10).......... and oil .

1. Turn off all the lights and you will not pay more money.

If ..........................................................................................................

2. Unless she wears warm clothes, she will have a cold.

If ..........................................................................................................

3. Be careful or you may have an accident.

If ..........................................................................................................

4. phone your parents or you have a trouble.

If ..........................................................................................................

5. Unless she whispers, everyone knows what she is saying.

If ..........................................................................................................

6. Stay here and you will feel save.

If ..........................................................................................................

7. Pay electricity bill today or your electricity will be cut off.

If ..........................................................................................................

8. Stop smoking otherwise your cough may be worse.

If ..........................................................................................................

9. Unless we use less fossil fuel, they will be run out soon.

If ..........................................................................................................

10. Unless it stops raining today, we may be faced with a serious flood.

If ..........................................................................................................

tìm và sửa lỗi sai:

1. If we run of oil, we need other kind of energy

2. If pollution will increase, more and more trees wil die

3. I usually feel worriedly before an exam

4. They are certain that they can help us cleaning up the beach

5. I am disappointed that they did not tell us how doing it

6. He couldn't meet you because of he was busy

7. She went to bed early because her sickness

8. The pupils were divided in small groups

9. Unless she doesn't take the Japanese course, he can't work with them