—Who cleaned the classroom yesterday？
—Kevin ________，I think．
| A．can |
| B．does |
| C．did |
| D．is |
This problem is ______ difficult __________.
| A．so; that few of us can do |
| B．so; that few of us can do it |
| C．too; for anyone of us to do |
| D．too; for anyone of us to do it |
_____ hard work it is! But _____ fun it is to finish walking the trail.
| A．What; how | B．What; what |
| C．How; how | D．How; what |
The life we were used to ________ greatly since 2002
| A．change | B．changing | C．have changed | D．has changed |
Your shoes under the bed _________. Put them in the sun, please.
| A．are smelt bad | B．smell bad |
| C．smell badly | D．are smelt badly |
The story book _________ for two weeks .
| A．has been borrowed | B．has borrowed |
| C．has been kept | D．has kept |