--- Is that man Mr. Smith?
--- It ______ be him. He has gone to NewYork on business.
| A．may not | B．needn’t |
| C．can’t | D．mustn’t |
_____I have one healthy habit, _____I’m not very healthy.
| A．Because ; / | B．Although; / |
| C．/; so | D．/; but |
---_______should we clean the library?
--- You should clean the library at least twice a week .
| A．How many | B．How much |
| C．How long | D．How often |
We think that the best way to relax is _______ exercise.
| A．about | B．in | C．at | D．through |
---Do you have____else to say for your mistake? ---________but sorry .
| A．anything; Something | B．something; Everything |
| C．something; Anything | D．anything; Nothing |
---What a nice watch! When_____you ____it? ---Three days ago.
| A．do; buy | B．did; buy |
| C．were; buy | D．did; bought |