He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn't | B．shouldn't |
| C．couldn't | D．mustn't |
—How unhappy your roommate looks!
—Yes, but he's not willing to tell me what it is ________ is troubling him.
| A．what | B．which |
| C．as | D．that |
When the millionaire was young, he was very poor. Only by doing parttime jobs during the summer holiday ________ afford to pay his college fees.
| A．he could | B．could he |
| C．can he | D．he can |
So quickly ________ is a possibility today may be a reality tomorrow.
| A．are science and technology advancing that |
| B．science and technology advancing are that |
| C．science and technology are advancing what that |
| D．are science and technology advancing that what |
The Chinese government promised that under no circumstances ________ the efforts to provide universal and lowcost health care.
| A．it would stop | B．it might stop |
| C．would it stop | D．might it stop |
Kate had a terrible time this summer. Not a day ________ without having some unpleasantness with her sister at home.
| A．she spent | B．she had spent |
| C．did she spend | D．had she spent |