5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 24
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They helped me a lot. I don't know what I_____ without their help.

17/20

They helped me a lot. I don't know what I_____ without their help.

have done

had done

would have done

will do

Giải thích

Chọn đáp án C