Hardly ______ the house when he realized that he had forgotten his keys.

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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

left

had left

had he left

he had left

Giải thích

Đáp án: C

Giải thích:

Cấu trúc: Hardly/Scarcer +had + S + Vp2+ when+ S + V(quá khứ đơn)

= No sooner + had + S + Vp2+ than + S + V(quá khứ đơn)

(Ngay khi/ Vừa mới ...thì)

Sửa: Hardly he had → Hardly had he

Dịch: Vừa ra khỏi nhà, anh nhận ra mình đã quên chìa khóa.