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The classroom ____________ when the teacher arrived .  

The classroom ____________ when the teacher arrived .

Câu hỏi

Nhận biết

The classroom ____________ when the teacher arrived .
 


A.
was being cleaned
B.
is cleaned  
C.
was cleaning
D.
was cleaned
Đáp án đúng: A

Lời giải của Luyện Tập 365

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