用动词的适当形式填空
Please make him ________ (do) the washing.
What can we do ________ (help) fight pollution?
Factories must ________ (clean) the water before they ________ (throw) it away.
As soon as I ________ (get) to the office tomorrow, I ________ (call) you.
Many years ago, people ________ (move) a lot in order to get cleaner land, air and water.
词性转换
The dictionary is far ________ than the one in my bag. (thick)
Today pollution is very serious, we can't fight it ________. (easy)
________ of these kinds can be used to make many things. (plastic)
Tell him not to drink the ________ water. (pollute)
We don't like to live in a ________ place. (noise)