The students in this class were made ________ very hard to learn

Câu hỏi :

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

A. learning

B. having learnt

C. to learn

D. learn

* Đáp án

C

* Hướng dẫn giải

Đáp án C

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