下图为某地月最高平均气温、月最低平均气温、年降水量逐月累计曲线图。完成问题。

根据句意和汉语提示，写出单词的正确形式。
____ On Children's Day, children could not hide their______________(excite).
____ He comes from the _______________(south) city of China.
____ Jim is happy to live on the ____________ (twelve) floor because he enjoys the view out of the windows.
____ Mr. and Mrs. Wang will celebrate their fifteen years of ____________ (marry) this weekend．
____ The water in the river is______________(harm). You can drink it without cooking.

课文《草原》里有不少打比方的句子，体会这样写的好处。

羊群一会儿上了小丘，一会儿又下来，走在哪里都像给无边的绿毯绣上了白色的大花。

“绿毯”指____，“白色的大花”指____。读了句话，我觉得____。

— What is it?  

— It's a ____.