MODULE 9 - Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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The guard ________ to his iPod, so he ________ the fire alarm. A. had listened / was not hearing B. was listening / did not hear C. listened / had not heard D. was listening / was not heari

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The guard ________ to his iPod, so he ________ the fire alarm.

had listened / was not hearing

was listening / did not hear

listened / had not heard

was listening / was not hearing

Giải thích

Chọn đáp án B