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Since nobody is answering the phone, they ______.A、should have leftB、must have
Since nobody is answering the phone, they ______.A、should have leftB、must have
游客
2023-09-26
18
管理
问题
Since nobody is answering the phone, they ______.
选项
A、should have left
B、must have left
C、need have left
D、can have left
答案
B
解析
本题考查的是对过去事实的推测。如果对过去的事实有较为肯定的推测,应用must have done sth.,故选项B为正确答案。A项表示“过去本应离开,实际上却没有”的意思,C项表示“过去本有必要离开,但事实上没有……”,D项表示“过去能离开却没有……”,都不表示对过去事实的推测,故排除。
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