北语16秋《大学英语》（三）作业1答案

16秋《大学英语》（三）作业1

一、单选题（共 20 道试题，共 100 分。）

1. Such crimes may be so complex that months or years go by before anyone ___ them. A. discovered B. will discover

C. would have discovered D. discovers 正确答案：D

2. I ___ the book I wanted to find before I left the bookstore. A. caught sight of B. caught C. got hold

D. lost sight of 正确答案：A

3. Before you leave, please ___ all the windows are closed. A. sure

B. make sure C. certain D. assure 正确答案：B

4. Mechanics ___ a concept in physics. A. is B. are C. was D. were 正确答案：A

5. I was always taught that it was ___ to interrupt. A. rude B. coarse C. rough D. crude 正确答案：A

6. They always give the vacant seats to ___ comes first. A. whoever B. whomever C. who D. whom 正确答案：A

7. Mike’s uncle insists ___ in this hotel.