Many people think any government's work should be evaluated ______ on citizens' happiness level．
| A．based | B．to be based | C．basing | D．being based |
— Remember the first time we met?
—Of course I do. You __________to the music on the stage.
| A．were dancing | B．had danced |
| C．have danced | D．danced |
It is not __________ for me to borrow all the books from the librarynow because I can only borrow one each time.
| A．difficult | B．convenient |
| C．available | D．important |
It was not until I went through his paper that __________ what rapidprogress he had made in writing.
| A．had I found | B．did I find |
| C．I had found | D．I found |
We did have a quarrel about money last night, but now we havealready __________.
| A．taken up | B．made up |
| C．put up | D．brought up |
When __________ whether Chinese could develop their own missiles,
Qian Xuesen said Chinese could do anything that foreigners coulddo.
| A．asked | B．asking |
| C．to asked | D．having asked |