I
1. People had evacuated before the rescue workers came.
⇒ After people had evacuated, the rescue workers came.
2. The air is polluted because there are too many vehicles here.
⇒ If there weren't too many vehicles here, the air would not be polluted
3. Acid rain is dangerous. Trees' leaves are damaged.
⇒ Because of the dangerous acid rain, trees' leaves are damaged.
II
1. People in affected area (move) _had moved_ to safe contemporary shelters before the storm came.
2. In the future, incurable diseases ( cure) __will be cured___
3. If we (have) ____had____ flying car now, we (solve) ___would solve____ the problem of traffic jams.
4. San Francisco ( often call ) _____is often called_____ " The windy city"
5. It's a pity you missed the party. If you (come) ____had come_____ you (meet) ____would have met_____ my friend from Hungary.
6.If we ( have) __had___ some tools, we ( be) ____would be_____ able to repair the car, but we haven't had any with us.
7. Thank you for your help. If you ( not help) ___had not helped__ me, I ( not pass) ___would not have passed___ the examination.
# Don't worry, the right ones won't leave.
# vhthuconan1