Thứ năm, 01/05/2025
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Câu hỏi:

19/07/2024 554

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

Before the cotton gin had been invented in 1794, American famers had cheap salves remove seeds from the cotton fiber.

A. had been invented

Đáp án chính xác

B. had         

C. salves     

D. from 

 Xem lời giải

Trả lời:

verified Giải bởi Vietjack

Chọn A

Câu đề bài: Trước khi máy tia hột bông được sáng chế ra năm 1974, các nông dân Mĩ đã dùng sáp rẻ tiền để lấy hạt ra khỏi các sợi bông.

à  Trong câu có 2 mệnh đề thời gian trước sau (có từ Before), mệnh đề ngay sau before sẽ xảy ra trước, nên mệnh đề còn lại được chia lùi thì.

Thay bằng: was invented.

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