1.I think the best way to protect the environment is to plant more trees.
2.A picnic in the park on weekends sound like a good idea.
3.He spend most of his time during the summer doing stuff online.
4.This well-known actress used to be a model.
5.When you talk to her a bit more you will see she is not as bad as you think.
6.As the day grow darker,we decide to find a place to stay overnight.
7."Stop doing that!You are giving me a headache," the mother said angrily.
如果doing可以改成其他词的话用yelling替换掉.
用doing我想不出什么办法把嚷嚷加进去.
8.Though your calligraphy cannot improve much in such a short time,you should still practice.