(Viên chức Mầm non) 30 đề ôn thi tiếng Anh có đáp án - Phần 12
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……complicated as it isserious. It is complicated (22) ………much pollution is caused by things that benefit people.

22/30

……complicated as it isserious. It is complicated (22) ………much pollution is caused by things that benefit people.

Because

so

That

While

Giải thích

Chọn đáp án A