MODULE 8 - Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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Four years ________ a required time for a student to complete his university education. A. is B. are C. has been D. were

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Four years ________ a required time for a student to complete his university education.

is

are

has been

were

Giải thích

Chọn đáp án A