1. Smoking cigarettes is not allowed in this hospital.
2. These bags are too expensive for me to buy in this time.
3. The film is so interesting that I've seen it twice.
4. Is this the address to which you want the package sent?
5. David is particularly fond of cooking, he often cooks really delicious meals.
6. Sandra rarely missed a play or concert since she was seventeen years old.
7. There was a very interesting new on the radio this morning about the earthquake in Italy.
8. The bridge hit by large ship during a suddenly storm has been mend.
9. Nam seldom pay his bills on time, and his brother does, too.
10. The letter was type clear and careful, but without any address or signature.

1. are =) is

2. these =) those

3. too =) so

4. whom =) bỏ

5. particular =) particularly

6. a =) any

7. a =) an 

8. suddenly =) sudden 

9. too =) neither

10. clear and careful =) clearly and carefully