Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

A. people

B. ages

C. sticks

D. trees

* Đáp án

C

* Hướng dẫn giải

Đáp án C

“they” được thay thế cho sticks trong vế trước: We do not know exactly when or how people first used fire. Perhaps, many ages ago, they found that sticks would burn

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