24. After ______ seemed a long time, Mr. Li stood up and broke the silence.
| A．what | B．that | C．it | D．Which |
I remember the whole thing _____ it happened yesterday.
| A．as | B．as if | C．even if | D．that |
Our experiment had got into _____trouble, so we decided to take _____ chance and add more water, and luckily, we succeeded.
| A．/ ; / | B．/ ; a | C．the; a | D．a; a |
–Would you mind us asking you a few questions?
–_______.
| A．Yes. Go ahead. | B．Not at all. You’d better not. |
| C．Not at all. Go ahead | D．No. I don’t mind. |
—Mother, can I turn on TV and watch the news?
—Of course, __________.
| A．go ahead | B．go on | C．go out | D．go forward |
_______ surprised me most was _______ such a little girl of seven could play the piano so well.
| A．That; what | B．What; that | C．That; that | D．What; what |