15000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 1)
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Because the highway system was built 40 years ago , most of the roads now need to repair. A. Because B. was built C. most of D. to repair

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Because the highway system was built 40 years ago , most of the roads now need to repair.

Because

was built

most of

to repair

Giải thích

Đáp án D

To repair => repairing hoặc to be repaired