1 . 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)

2 . You need to learn Chinese __________ his company is opening a branch in Beijing. （用适当的词填空）

3 . In our school there are 50 students, half of __________ wear glasses. （用适当的词填空）

4 . Wilhenlm Roentgen was a German scientist. In 1895 he was doing an experiment __________ he discovered X-rays by accident. (用适当的词填空)

5 . The musician along with his band members ________ (give) ten performances in the last three months. （所给词的适当形式填空）

6 . He’s got himself in a dangerous situation ______ he is likely to lose control over the plane.

A．when

B．that

C．which

D．where

7 . There are some health problems that, when not ___________(treat) in time, can become bigger ones later on. (所给词的适当形式填空)

8 . The film brought the hours back to me ________ I was taken good care of in that far-away village.

A．when

B．until

C．that

D．where

9 . I can think of many cases _________ students obviously knew a lot of English words and expressions but couldn’t write a good sentence. (用适当的词填空)

10 . —What was the party like?
—Wonderful. It’s been years _______ I enjoyed myself that much.

A．after

B．before

C．when

D．since