1. C. to prepare -> preparing ( sau spent động từ thêm ing)
2. B. would be -.> will be( câu điều kiện loại 1)
3. C. of-> for.
4. B. meet -> meeting.
5. C. joining -> to join
6. B. told -> had told.
7. B. taking -> to take
8.C. being breaking -> being boken
9. A. lending -> to lend
10. B. would she -> she would