.1. The classroom is still very dirty. I don’t think it has been cleaned(1- clean).

2. (2-Lie)Lying on the beach on a sunny day is pleasant.

3. After (3-shout)shouting for help, she (4-take)took off her shoes and (5-jump)jumped in (6-save)saving him.

4. Once you (7-try)try Gloswhite toothpaste, you (8-never use)will never use anything else.

5. (9-Write)Had written the letter, she put it in an envelope.

6. Each July, George together with his family (10-go)goes to Spain for holiday.