Jack has been feeling down recently . I wonder that is making him so upset .
| A．what is it | B．why is it | C．why it is | D．what it is |
_ we left the building that I realized how dangerous the situation had been.
| A．Only then | B．It was only then | C．Only after | D．It was only after |
____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
| A．It | B．As | C．What | D．That |
On the chairs_______, who had come to Sanming looking for jobs.
| A．three young men sat | B．sat three young men |
| C．did three young men sit | D．three young men sitting |
I’m so glad to see you back, Lucy. How long _______at your grandma’s?
| A．had you stayed | B．did you stay | C．have you stayed | D．would you stay |
Hardly ______________ when it began to rain.
| A．had the game begun | B．began the game |
| C．the game had begun | D．did the game begin |
When the teacher speaks, we have to keep quiet, ?
| A．don’t we | B．mustn’t he | C．haven’t we | D．doesn’t he |
Peter has been busy these days and seldom ____ to come over to have a chat with me.
| A．does he have time | B．he has time |
| C．doesn’t he have time | D．he hasn’t time |
He was finally admitted to Beijing University. Never in all his life ______ so happy.
| A．he had felt | B．had he felt | C．he felt | D．did he feel |
24. You ought to have put the milk in the refrigerator, and now ________sour.
| A．it smell | B．it is smelt | C．it smells | D．it is smelling |