4．A．同上。
3．A．同上。
2．A．同上。
1．D．前后两个分句意思相反，表转折，应用but
18．He is listening to the music ____ he is washing clothes
A．after
B．before
C．that
D．while
参考答案
17．The boy is only ten, ____ he can do some washing himself
A．though
B．but
C．or
D．so
16．That was our firtst lesson, ____ she didn't know all our names
A．for
C．so
D．or
15．We bought Granny a present, ____ she didn't like it.
A．but
B．and
C．when
D．if
14．Jim is an American, ____ he can speak very good Chinese.
A．if
B．so
C．but
D．because
13．Be quick, ____ you'll be late for the football match.
A．so
C．and