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HE WAS BUSY WITH ____HIS HOMEWORK. A. DO B. DOING...
HE WAS BUSY WITH ____HIS HOMEWORK. A. DO B. DOING C. DID D. DONE
File thứ 15: Anh 10
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7. He was busy with ____his homework. A. do B. doing C. did D. done
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7.
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File thứ 15: Anh 10