What does the word “they” in paragraph 2 refer to?
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Đáp án A
Từ "they" trong đoạn 2 chỉ điều nào sau?
A. phi hành đoàn trạm vũ trụ
B. thực vật
C. môi trường
D. nhà kính của nhà ga
Từ “they” thay thế cho danh từ phi hành đoàn trạm vũ trụ ở câu trước.
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Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.
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