18.( ) The dress fits me well, I don’t want to buy it because it’s too expensive.
A. so B. and C. or D. but
17.( )Uncle Wang gave all his savings to the Hope School he himself was not rich.
A.because B.as if C.though D.or
16.( )I arrived at the airport the plane had taken off.
A.after B.while C.when D.beflore
15.( )一Be careful, you will make mistakes in your exams.
--I know that,Mum.One can never be too careful.
A.and B.or C.nor D.but
14.( ) Study hard, you'll fall behind the others.
A. and B. but C. or D. though
13.( ) – How long have you known the doctor ?– he helped me three years ago.
A. When B. Before C. Because D. Since
12.( ) Come see my family.
A. and B. or C. but D.until
11.( ) When someone is ill, he ____________ she should try to smile at life.
A. and B. but C. or D. so
10.( ) -Look! Here comes our school bus.
-No hurry. Don’t get on it ______it has stopped.
A. until B. after C. since D. when
9.( ) I didn’t know he came back ________________ I met him in the street.
A. since B. when C. until D. after