Đề kiểm tra học kì 2 Tiếng anh 12 năm 2023 có đáp án (Đề 4)

Bob was absent ; he sick again. A. must be B. must be being C. mustn’t have

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Bob was absent ; he __________ sick again.

must be

must be being

mustn’t have been

must have been

Giải thích

Đáp án D