--- I’m sorry that I can’t go to your party tonight.
---- ______ ? Haven’t we agreed on it ?
| A．What is it | B．Why don’t you | C．What do you think | D．How is it |
You have seen Helen in her office this morning because she’s been out of town for two weeks.
| A．needn’t | B．mustn’t |
| C．mightn’t | D．couldn’t |
in 1898, Beijing University is one of the top universities in China.
| A．Being founded | B．It was founded |
| C．Founded | D．Founding |
There is no doubt they will give me a hand if I have any trouble.
| A．which | B．that | C．whether | D．when |
There is still much to discuss. We shall, ______, return to this at our next meeting.
| A．so | B．however |
| C．because | D．Therefore |
Dr Yuan Longping grows _____ is called super hybrid rice, _____ has a high output.
| A．what; which | B．that; what |
| C．that; which | D．what; that |