By the time Jack came with help, we _______ the work. A. finished B. had finished C. finish D. have finished

Câu hỏi :

By the time Jack came with help, we _______ the work.

A. finished

B. had finished

C. finish

D. have finished

* Đáp án

B

* Hướng dẫn giải

By the time + S1 + V1 (ed/ dạng PI), S2 + had + V2(ed/ dạng PII)

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