1. They haven’t seen that film about 3 years. ⇒ for
2. The milk was such sour that we couldn’t drink it. ⇒ so
3. Because her illness, she was absent from the meeting yesterday. ⇒ because of
4. His English improved well recently. Oh, I see. ⇒ has been improved
5. I won’t have meat for every meal because of I am on a diet. ⇒ bỏ of
6. You must know when to giving sincere advice to your friends. ⇒ to give
7. Steve wondered if to put himself in his competitor’s shoes. ⇒ bỏ if
8. Tom said he was fully book for the weekend with his music club. ⇒ was fully booked
9. I have no idea how encourage Sarah in her choice of extra class. ⇒ to encourage
10. Jim asked whether I were stress out and exhausted or not. ⇒ was