1 . That’s the shop assistant _________ served me the last time I came here. (用适当的词填空)

2 . She was not in the train _________arrived just now. (用适当的词填空)

3 . At the party she spoke to Mr. Peterson, _________ father owned the company. (用适当的词填空)

5 . 毫无疑问，我们从先进的科技中受益。(汉译英)

7 . It is after all we ________ are the visitors to their world. (用适当的词填空)

8 . What if the only way of getting news from faraway friends was writing letters ________ took ages to be delivered?(用适当的词填空)

9 . My washing machine ________ (repair) this week, so I have to wash my clothes by hand. (所给词的适当形式填空)

10 . I know the student, ________ is helping an old lady.

A．which

B．who

C．whose

D．that