----Any news about Bill Clinton?
----He left power three years ago and has a little now and a little then been ______.
| A．heard of since | B．heard since | C．heard before | D．heard of before |
．I really don’t know _______I kept the secret papers．
| A．where was it | B．it was where that |
| C．where it was that | D．where was it that |
．The problem ________now is very important．
| A．being discussed | B．discussed | C．discussing | D．to be discussed |
．— According to my grandma, it is a good idea to eat chicken soup when you have a cold．
—________, scientists agree with her．
| A．Sooner or later | B．Once in a while | C．To be exact | D．Believe it or not |
．— Catherine, I have cleaned the room for you．
— Thanks, but you ________it．I could manage it myself．
| A．needn’t do | B．needn’t have done | C．mustn’t do | D．shouldn’t have done |
．_______from the top of the tower, the north foot of the mountain is a sea of flowers．
| A．Seeing | B．Having seen | C．Seen | D．To see |