Hãy sửa lại từ không đúng trong các câu sau
1. I'm afraid you will regret to lend / him the money
2. Please remember / wiping your feet before / coming in
3. She has been waiting / for / her mother / for five o'clock
4. He will be / in town on Monday till Saturday
5. There were / a lot of visitors in the city since last month
6. This exercise is / so difficult that we can / do it
7. You should certainly to tell them to / bring their books next time
8. Do you know the man who / walked / on the other side of the street?
9. I was writing a letter to him before I heard / from him
10. The trees were cutting / down when I came / to his house
