There is no doubt ______ he will not be admitted to the room.
| A.if |
B. whether |
C. that |
D. which |
The astronauts were so struck by ______beauty of nature that they took lots of pictures in _______space. 
21.
| A．the ; / | B．the; the | C．/; the | D．/;/ |
－Good evening, Mr. Green. I’m sorry to bother you. But it’s the fourth of December today.
－Oh, Mrs. Baxter, ________ rent! I’m sorry it’s late. I’ll write you _______ check right now.
| A．the; the | B．a; a | C．a; the | D．the; a |
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 |