The villagers cleaned up the contaminated river. It looks cleaner now.

A. Unless the villagers clean up the contaminated river, it won’t look cleaner now.

B. If the villagers didn’t clean up the contaminated river, it wouldn’t look cleaner now.

C. If the villagers hadn’t cleaned up the contaminated river, it wouldn’t look cleaner now.

D. Provided that the villagers don’t clean up the contaminated river, it won’t look cleaner now.

[018] - Bài tập Luyện thi Tiếng Anh THPT Quốc gia - Chuyên đề: CÂU ĐIỀU KIỆN (Bài tập 2)