—How long did you do your homework? —______.
| A．Before it struck 10 | B．Since supper time |
| C．So long as I stayed up | D．Until 10 o’clock |
It’s good know _______ the dogs will be well cared for while we’re away.
| A．what |
| B．whose |
| C．which |
| D．that |
A modern city has been set up in _______ was a wasteland ten years ago.
| A．what |
| B．which |
| C．that |
| D．where |
Determination is a kind of basic quality and this is ________ it takes to do jobs well.
| A．what |
| B．that |
| C．which |
| D．why |
The difficulty we now meet with is ________ we can persuade him to tell the truth.
| A．whether |
| B．that |
| C．what |
| D．why |
Then Mr Smith told me ________ he was doing was very important.
| A．that |
| B．why |
| C．what that |
| D．why what |