4 People travelling long distances frequently have to decide _____ they would prefer to go byland see or air. (ll.1-2)

a. which b. how c. what d. if

5 If you are _____ a sleeper …(ll.8-9)

a. luckily getting b. lucky and get c. to get luckily d. so lucky to get

★★6 ----and enjoy good food _____ , of course, that the sea is calm. (ll.13-14)

a. provided b. in the event c. in case d. if only

如果内心的期望和事实没有关系，表达“如果”采用的结构形式不是if,不是suppose, 而是providing orprovided

Eg: I’ll take all the shirts if / provided you reduce the price to $1 each.

7 In addition, it _____ their being the most expensive form of transport. (l.19)

a. has been a grave disadvantage b. is the great disadvantage that

c. is a great disadvantage d. has been the great disadvantage of

in addition 表示承上启下，除此之外还有

如果用apart from, besides, in addition to, 必须和宾语进行搭配。