Read and correct：I will climbed the mountain yesterday. ___________

用所给词的正确形式填空。
【小题1】He _________ (have to) stay at home because it is raining outside.
【小题2】Kitty, please don’t _________ (play) with fire!
【小题3】The paper is _________ (make) from wood.
【小题4】The tree in front of my house _________ (keep) the air clean.

选出不同类的单词：(   )

A．see

B．bought

C．lose

按要求写单词。
1. ask ( 反义词 ) ____________
2. country ( 复数形式 ) ____________ 
3. cities ( 原形 ) ____________ 
4. tall ( 最高级 ) ____________ 
5. hear ( 过去式 ) ___________