The cars give off a great deal of waste gas in the streets. — Yes. But I’m sure something will be done to ___ air pollution.

How do you find Haikou,Mary?— It’s a beautiful seaside city. I have _______ it for my winter holiday.

e visited Zhou Zhuang again ten years later, wefound it changed so much that we could hardly ________ it.

If you can’t find the place, I’ll show you ______.

With his son _______, the old man felt unhappy.[ ]