根据句意和汉语提示，写出单词的正确形式。

小题1:On Children’s Day, children could not hide their______________(excite).

小题2:He comes from the _______________(south) city of China.

小题3:Jim is happy to live on the ____________ (twelve) floor because he enjoys the view out of the windows.

小题4:Mr. and Mrs. Wang will celebrate their fifteen years of ____________ (marry) this weekend．

小题5:The water in the river is______________(harm). You can drink it without cooking.

尾箱互换时，必须保证互换双方柜员必须是已签退状态。