When I try to understand that prevents so many Americans from being as happy as one might expect, it seems that there are two causes.
| A．why it does | B．what it does | C．what it is | D．why it is |
It’s the same in China --- many people, ________ some are not overweight at all, are always going on diets or taking weight-loss pills, ________ are often dangerous.
| A．whose; which | B．of which; who | C．of whom; which | D．who; that |
I would appreciate _______ you could give me some advice on TOFEL test.
| A．that when | B．it whether | C．it if | D．that if |
The Arabian Nights _____ well known all over the world, in which many a story_____ interesting and instructive．
| A．is; are | B．are; is | C．are; are | D．is; is |
Spoken English slightly differs from country to country. For instance, in some parts of the US the “r” sounds at the end of the words______.
| A．is dropped | B．have dropped | C．has dropped | D．are dropped |
–The party will begin as soon as all the guests arrive.
—Look, here _____ all the guests!
. is coming B. are coming C. come D. comes