John was not here yesterday. Perhaps he was ill

25/30

John was not here yesterday. Perhaps he was ill.

John needn’t be here yesterday because he was ill.

Because of his illness, John shouldn’t have been here yesterday.

John might have been ill yesterday, so he was not here.

John must have been ill yesterday, so he was not here.

Giải thích

Chọn đáp án C

Dịch nghĩa: John không ở đây hôm qua. Có lẽ anh ấy bị ốm.
Lưu ý: Should + have + PII: đáng lẽ không nên làm gì nhưng đã làm
Must+ have + PII: chắc chắn đã làm gì trong quá khứ
Might/May + have + PII: có thể đã làm gì trong quá khứ