专四
A． must
B． need
C． could
D． may
情态动词题。need可以用于完成时态，表示不需要完成但是已经完成的动作，need not have done暗含时问或精力的浪费。因此[B]选项正确。
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A． as much ten time
B． as ten times much
C． ten as times much
D． ten times as much
A． to sound
B． to be sounded
C． sounding
D． to be sounding
A． In case
B． As long as
C． Although
D． Despite
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根据以下资料，回答题：
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