Loudspeakers were fixed in the hall so that everyone _______ an opportunity to hear the speech.

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问题 Loudspeakers were fixed in the hall so that everyone _______ an opportunity to hear the speech.

选项 A、ought to have
B、must have
C、may have
D、should have

答案D

解析 so that引导的目的状语从句,从句中常用may。但是本句主句用的是过去时态,所以从句;也应该用相应的表示过去的时态,只有should have符合要求。
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