在沙特阿拉伯，一些旅店把床铺安排在屋顶上。其中的原因有()

巴拿马运河沟通的两个大洋是()

太阳能够垂直照射的最南界线是()

世界上面积最大的盆地是()

一天中最高气温应出现于()

风车、郁金香与下列哪个国家有关()

-The young man who entered our factory last month has made some mistakes this week.

-Well. _______.

Ladies or gentlemen, whether young or old, _______ some money of yours to the poor people in the mountain area who are suffering.

-How do you like this piece of music by Tan Dun?

-Well, of all the music that he has written, I think this is his_______ one.

-This kind of sports is exciting.

-Yes, but it's dangerous. One can't do it_______ he or she has got some training.