Câu hỏi:
22/10/2020 1,774* 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 A. had been invented in 1794, American famers B. had cheap C. salves remove seeds D. from the cotton fiber.
Đáp án chính xác
Câu hỏi trong đề:
Tổng hợp 30 Đề thi thử THPTQG 2021 môn Tiếng anh hay nhất có lời giải !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Giải bởi Vietjack
ĐÁP ÁN 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.
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.
Nhà sách VIETJACK:
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