The professor was so ______, hardly anyone came to class.
| A．popular | B．boring | C．friendly | D．lively |
It’ll be 3 days _____ he _____ back from his hometown.
| A．when; will come | B．after; will come |
| C．since; comes | D．before; comes |
_______I think it good for you to try the new position, never_______ more responsibilities than you can handle.
| A．Since; burst into | B．While; take on |
| C．If; toy with | D．When; cut back |
---The worksite next to my house was so noisy.
---You ____ a sleepless night.
| A．must have had | B．would have had |
| C．should have had | D．can have had |
_____to nuclear radiation, even for a short time , may produce variants(变异体) of genes in human bodies.
| A．Being exposed | B．Having expose |
| C．Exposed | D．After being exposed |
---It is hard to ______ such an unpopular policy.
---I can’t agree more. Not many people will ______ it.
| A．put up with; agree |
| B．push ahead with; support |
| C．end up with; in favor of |
| D．come up with; for |