I hate travelling by air__________ you usually have to wait for hours before the plane takes off.
A.because B.though C.until D.unless
Which do you prefer to use to keep in touch with your friends，QQ__________MSN?
A.and B.but C.or D.so
The volunteer spoke as__________ as she could to make the visitors understand her．
A.clearly B.more clearly C.most clearly D.the most clearly
— Must I go to medical school and be a doctor like you，Dad?
— No，you__________，son．You’re free to make your own decision．
A.can’t B.mustn’t C.shouldn’t D.needn’t
My old neighbour Charles felt__________ after his children moved out．
A.lonely B.safely C.angrily D.happily
—__________ have you been in the sports club?
—Since the first month I came to the school．
A.How old B.How long C.How much D.How soon
