2013高考英语二轮抢分小专项强化训练51
单项填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. Dogs have a very good____ of smell and are often used to search for survivors in an earthquake.
A. sense B. manner C. means D. idea
22. The building ____will be completed in a month. It will be our dining hall.
A. to build B. being built C. to have built D. built
