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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions Trả lời câu hỏi dưới đây:Tom could  _________ in the garage when I came around, which would explain why he didn't hear the bell.  

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each

Câu hỏi

Nhận biết

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

Trả lời câu hỏi dưới đây:

Tom could  _________ in the garage when I came around, which would explain why he didn't hear the bell.  


A.
have worked  
B.
be working 
C.
have been working
D.
work 
Đáp án đúng: C

Lời giải của Luyện Tập 365

Cấu trúc: could have been doing: có khả năng đang làm gì đó tại một thời điểm nhất định trong quá khứ nhưng đã không làm.  

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