Bài 1 :Sửa lỗi sai 1 The librarian asked him to return the book but i refused to do that 2 My friend had been in London before but i had not 3 This room is too small for us to dance this kind of music 4 We found the hotel very convenient and was not too expensive 5 She both lost her watch and her passport 6 They were not very friendly to us They even did not sy hello 7 She looks beautiful as a princess 8 He is no more a student 9 I will not probably see you tonight `0 Could you speak slowlier , please? I cannot understand

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