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1. If we ( keep on ) keep on using more and more motor vehicles, we (run out) will run out of oil
2. If we ( run out) run out of oil, we (need) will need other kind of energy.
3. If we (use) use more oil and coal, pollution (increase) will increase.
4. If pollution (increase) increases, more and more trees (die) will die.
5. If more and more trees (die) die, the climate (change) will change
6. If the climate change) changes, we meet) will meet with natural disasters.
7. If we( try) try to control pollution, it (be)will be very expensive
9 If you (want) want to speak English fluently, you (must practice)it more often.
10 He (passes )the exam if he (study) hard.
11. If he invites) me, I'll accept.
12.What will you do (do) if she refuses your invitation?.
13.If I (be)am free, I'll visit you.
14.He'll be late for school if he (not get)doesn't get up early.
15.If he (read)reads in bad light, he'll ruin his eyes.
16.If he (take)takes my advice, everything can go well.
1/ C. are running --> will run
2/ B. recycling --> recycle
3/ C. sending --> send
4/ A. will be --> is
5/ C. made
1/ C.
2/ B.
3/ C.
4/ A.
5/ C.