(Viên chức Mầm non) 400 câu trắc nghiệm multiple choice tiếng Anh có đáp án - Phần 10
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The children ______ to bed before their parents came home from work.

22/30

The children ______ to bed before their parents came home from work.

were all going

had all gone

had all been going

haveall gone

Giải thích

Chọn đáp án B