1.I think the best way to protect the environment is to plant trees
2.Having a picnic in the park sounds like a good idea
3. When I look back on the childhood, I still thought it was the happiest time of my life .
4.The girl who had been a model is now a well-known actress.
5. Talking with him for about a few times, you will find she is not so bad as you thought.
6.It getting dark, I decided to find a place to settle down.
7.Students who make good use of time will usually get good grades.
8.Although it is difficult to improve your cooking skills in such a short period of time , you should keep practicing.