Bộ 5 đề thi giữa kì 1 Tiếng Anh 11 i-Learn Smart World có đáp án - Đề 1

Cheap public transportation was highly encourage to use ten years ago, and air pollution has been reduced since then. A. public transportation                       B. encourage C. been red

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Circle the letter A, B, C, or D to show the underlined part that needs correction.

Cheap public transportation was highly encourage to use ten years ago, and air pollution has been reduced since then.

public transportation

encourage

been reduced

since

Giải thích

Chọn B