Viết lại câu không đổi nghĩa

----- Nội dung dịch tự động từ ảnh -----
..........
9. People don't keep those books for reference.
10.The principal doesn't write this letter.
11.They ask him many questions.
12.They prepare the meeting carefully.
13.She makes a large cake for the celebration.
14.He doesn't admire those acrobats.
.......