(Viên chức Mầm non) 1128 câu trắc nghiệm Tiếng Anh A2 có đáp án - Phần 2
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Louise was listening to the radio while she .............. the house.

24/30

Louise was listening to the radio while she .............. the house.

is cleaning

was cleaning

had cleaned

will clean

Giải thích

Chọn đáp án B