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----- Nội dung dịch tự động từ ảnh -----
16.Afetr class, one of the students always erases the chalk board.
17.You must clean the wall before you paint it.
18.They told the new pupil where to sit.
19.1 knew that they had told him of the meeting.
20.Nobody has never treated me with such kindness.
21.No one believes his story.
22.A student increase in water pressure may break the dam.
23.We must take good care of books borrowed from the library.
24.A man I know told me about it.
25.We can never find him at home for he is aways on the move.
26.They use plastic for making bags.
27.Science and Technology have completely changed human life.
28.John used to visitMr Cole at weekends.
29.Weeds cover the river bank.
30.Smoke filled the kitchen.