大自然的清洁工是____。 

下列各句中，没有语病的一项是（    ）

把错乱的句子排成一段通顺的话，在括号里写上序号。

____从此，小红放学后，再也不贪玩了。

____妈妈对她说“要做好功课再玩。”

____小红一放学回家，就要出去玩。

____小红立刻做起功课来。

阅读下列短文，从每小题的三个选项中选出最佳选项。

    Hello, my name's Kitty. I have a big family. My grandparents are old. They are thin.

    David is my father. He is fat. He is a policeman(警察). This is my mother. Her name is May. She's tall and thin. She is a nurse. John is my uncle. He has a pair of glasses. He is a doctor. He can help people. Sue is my aunt. She has big eyes. She likes kids. She is a teacher. I have one cousin. His name is Peter. John and Sue are his parents.

根据下列实验装置图回答问题：