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Bob was absent; he _____ sick again.

Bob was absent; he _____ sick again.

Câu hỏi

Nhận biết

Bob was absent; he _____ sick again.


A.
must be
B.
must be being
C.
mustn’t have been  
D.
must have been
Đáp án đúng: D

Lời giải của Luyện Tập 365

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