一、选择填空(共15小题,计30分)
从A、B、C、D中选出能填入各句空白处的最佳答案。
1. If you don’t know how to spell the new word, please __________ in the dictionary.
A. look at B. look them up C. look up it D. look it up
2. —How do you study for a test? —I study_____ working_________ a group.
A. in, with B. by, at C. by, with D. in, by
3. His parents ______ in the country, but now they live in the city.
A. used to live B. used to living C. were used to live D. are used to living