Many people are __________ building a chemical factory（化工厂）near here . They are worrying about the possible pollution .

Mr. Lin is ___________ at repairing hard wares.

You’d better put a cloth over the salad to ______ the flies for the sake of health.

You can’t watch TV _______ you finish your homework.

－ In modern times, girls like beautiful clothes. － Yes, _____and _____boys. After all, our life has been greatly improved. [ ]