一道关于英语的题目 选用适当的词用适当的形式填空..
cousin;main;dirt;research;clean
1 All my____get together during Spring Festival.
2 He is doing some____on how to protect the environment.
3 The talk is_____about how to help children in poor villages.
4 Don't drink the water.It is very_____.
5Those clothes look very____because she has washed them.
形式呢....