1. (2020·黔西南州) 根据句意，在方框中选用合适的词或短语，用其适当形式完成下列句子。每个选项只能选用一次，注意其中有两项为多余选项。

after   during   pollute   do   pay for   animal   work

1. （1） China has made great progress the past forty years.
3. （2） We should friendly to . We are all living in the same world.
5. （3） How much did you your new bicycle?
7. （4） If the air is , it is dangerous and will do harm to our health.
9. （5） My father is a good teacher who for his students day and night.