Chuyên đề 20: Kiểm tra

Students often use their calculators to solve difficult questions,______? A. don't we B. do they C. don't they D. do we

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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following Questions.

Students often use their calculators to solve difficult questions,______?

don't we

do they

don't they

do we

Giải thích

Chọn C