English is essential in this job. All the telephonists speak it. If they (not know)____ English

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English is essential in this job. All the telephonists speak it. If they (not know)____ English

Đề bài: English is essential in this job. All the telephonists speak it. If they (not know)____ English, they (not understand)______ half the callers.

A. didn't know - would not understand

B. hadn't known - would not understand

C. didn't know - did not understand

D. didn't know - would have not understood

Lời giải:

Đáp án: A

Giải thích: Cấu trúc điều kiện loại II: If + S + Vqkđ, S + would + Vinf.

Dịch: Tiếng Anh là cần thiết trong công việc này. Tất cả các điện thoại viên nói nó. Nếu họ không biết tiếng Anh, họ sẽ không hiểu một nửa số người gọi.

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