A. Choose the best answer
1. You can look …………. a word in a dictionary if you don’t know what it means.
A. into B. for C. up D. over
2. They have to clean the whole area before dark, ……………?
A. don’t they B. do they C. haven’t they D. have they
3. The air in the city ………………. with traffic fumes.
A. is heavy polluted B. is polluted heavy C. is heavily polluted D. polluted heavily
4. ……….. it’s raining again, we’ll have to stay at home.
A. While B. Although C. As D. Unless
5. We leave early ……….. miss the last bus.
A. in order not B. so as not C. in order to D. in order not to
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