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LoudspeakerswerefixedinthehallsothateveryoneanopportunitytohearthespeechA.oughttohaveD.shouldhaveoughtto和shoud有区别么

题目详情
Loudspeakers were fixed in the hall so that everyone______an opportunity to hear the speech
A.ought to have
D.should have
ought to 和shoud 有区别么
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答案和解析
d 可以表示判断,即这样就应该能,.,.,.
a 本能,应该去做,一种职责,