Bộ 3 đề thi giữa kì 2 Tiếng Anh 10 i-Learn Smart World có đáp án (Đề 1)
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In my opinion, the computer is the greatest machine ______________ has ever been invented.

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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.

In my opinion, the computer is the greatest machine ______________ has ever been invented.

whom

of which

that

who

Giải thích

Chọn C