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

No sooner had we left the house, _______ it started snowing.

A. andB. thanC. whenD. that

Đáp án đúng là: B

Cấu trúc: No sooner + had + S + PII... + than + clause(QKĐ) = vừa mới...thì...
Chúng tôi vừa mới rời khỏi nhà thì trời bắt đầu đổ tuyết.