_______ Tom, we wouldn’t have been late for the last bus.
| A．If we didn’t wait for | B．If we haven’t waited for |
| C．we hadn’t waited for | D．Had we not waited for |
Men of this kind _______; we’d better ________.
| A．is dangerous; keep away | B．are danger; keep away from him |
| C．are dangerous; keep away from them | D．is in danger; keep away |
--- I was trying to repair that stupid machine, but I failed.
--- Well, you_______.
| A．needn’t do that | B．needn’t have done | C．needn’t have | D．needn’t |
---What are you busy with ?
--- We are carrying out a research _______ the causes of cancer.
| A．into | B．onto | C．to | D．in |
---I hear there will be ______ talk on English study tomorrow morning.
---Do you mean ______ speech our teacher asked us to listen to?
| A．a; the | B．the; a | C．the; the | D．a; a |
After I returned to my hometown, I was pleased to find that it had a new look.
| A．taken off | B．taken after | C．taken in | D．taken on |