She have left school， for her bike is still here.
| A．can’t | B．wouldn’t | C．shouldn’t | D．needn’t |
It was in the factory _________ produced TV sets _________ I got to know her.
| A．which; which | B．that; which |
| C．that ；that | D．where ； that |
Factory workers have to work very hard, and _________.
| A．farmers do so | B．farmers work so |
| C．so have farmers | D．so do farmers |
Only when David did it a second time _________.
| A．he realized his mistake |
| B．he was realizing his mistake |
| C．did he realize his mistake |
| D．he did realize his mistake |
So instructive _________ that the student wanted to see it again.
A. was the film B. it was the film
C, the film was D. the film it was
Not until I went to America _________ what kind of country it was.
| A．did I know | B．I did know |
| C．I didn't know | D．I could know |