—What's wrong with you,Eric? You look tired．
—I ________ studying to prepare for the final exam last night.（ ）
A.picked up B.stayed up C.woke up
—Teenagers should not be allowed to have part-time jobs．
—I ________.They can learn a lot from working．（ ）
A.doubt B.disappoint C.disagree
The boy is often heard _________ in the music room. He sings very well.
A.practise singing B.to practise singing C.practised singing
—________your house be cleaned right now？
—No,it needn't.It may be cleaned this afternoon．（ ）
A.Must B.May C.Can
Boys and girls! Put your heart into the examination and you are sure to gain ___ unexpected surprise．（ ）
A.a B.an C.the
Which of the following words doesn't have the same stress as the others？（ ）
A.support B.receive C.manner
