Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
x my father sat down for lunch than there was a knock at the door.
A. Hardly had
B. No sooner had
C. At no time had
D. Never before had
Đáp án là B.
Cấu trúc đảo ngữ “ No sooner had + S+ PII + than +S+ V-ed. Vừa mới ... thì đã...