题目内容
(请给出正确答案)
[单选题]
All the mobilephones must______ before the meeting starts.
A.be turning off
B.turn off
C.be turn off
D.be turned off
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A.be turning off
B.turn off
C.be turn off
D.be turned off
第1题
A.did I realize
B.had I realized
C.I had realized
D.I realized
第3题
A.can't
B.wouldn't
C.shouldn't
D.needn't
第4题
A.met
B.meeting
C.to meet
D.meet
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