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Câu hỏi:

19/07/2024 16

She ________ her research project diligently while her colleagues were conducting experiments.

A. is undertaking

B. undertakes

C. was undertaking

Đáp án chính xác

D. undertook

Trả lời:

verified Giải bởi Vietjack

Giải thích: 

Sự phối hợp thì: QLTD + while (trong khi) + QKTD – 2 hành động diễn ra song song trong quá khứ.

Tạm dịch: 

Cô ấy đang dự án nghiên cứu của mình một cách cần mẫn trong khi đồng nghiệp của cô ấy đang tiến hành thí nghiệm.

Đáp số C

Câu trả lời này có hữu ích không?

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