—My boy is always making trouble at school.It makes me upset.
—________—there’s nothing to worry about!
| A．Don’t mention it | B．I hope not | C．What a shame | D．Calm down |
The old lady’s hand shook frequently. She explained to her doctor ________ this shaking had begun half a year before, and ________, only because of this, she had been forced to give up her job.
| A．when; how | B．how; when |
| C．how; how | D．why; why |
Great changes have taken place in that school, it is no longer ________ it was 20 years ago, ________ it was so poorly equipped.
| A．what; when | B．that; which | C．what; which | D．which; that |
The way he did it was differentwe were used to .
| A．in which | B．in what | C．from what | D．from which |
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
| A．which | B．that | C．what | D．whether |
The place _______ the bridge is supposed to be built should be________the cross-river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which; in which |