We couldn't solve the problem until our teacher arrived.

Câu hỏi :

We couldn't solve the problem until our teacher arrived.

A. Not until we solved the problem could our teacher arrive.

B. When our teacher arrived, we solved the problem.

C. Until our teacher arrived, we were able to solve the problem.

D. Not until our teacher arrived could we solve the problem.

* Đáp án

* Hướng dẫn giải

D

Kiến thức : Đảo ngữ với Not until + Clause, TDT + S + V

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