CHUYÊN ĐỀ 2 THÌ ĐỘNG TỪ (VERB TENSES)
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We……….up the hill for half an hour when we realized we……….in the direction of the castle. A. were walking - haven’t been going B. had been walking - weren't going

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We……….up the hill for half an hour when we realized we……….in the direction of the castle.

were walking - haven’t been going

had been walking - weren't going

have been walking - didn't go

had walked -wouldn’t be going

Giải thích

Chọn B