x my father sat down for lunch than there was a knock at the door

Câu hỏi :

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

A. Hardly had  

B. No sooner had

C. At no time had      

D. Never before had

* Đáp án

* Hướng dẫn giải

Đáp án là B.

Cấu trúc đảo ngữ “ No sooner had + S+ PII + than +S+ V-ed. Vừa mới ... thì đã...

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