2.He………… have committed the crime because he was with me all day. A.Mustn’t B.shouldn’t C.won’t D. Can’t 3. Since we

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1. 2.He………… have committed the crime because he was with me all day.

   A.Mustn’t B.shouldn’t C.won’t D. Can’t

   ⇒ Could have PII: đã có thể làm gì

   3. Since we have to be there by 8:30, we…. take a taxi

   A.had better B.May C.could D.are able to

   ⇒ Cấu trúc : had better do sth (nên làm gì hơn)

   4 .MrBrown is very rich. He ……… work hard for a living.

   A.mustn’t B.shouldn’t C.can’t D.doesn’t have to

   ⇒ Vì vế trước có  Mr. Brown rất giàu, nên suy ra ông ấy không cần thiết (doesn;t have to) làm việc quá vất vả.

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