综合填空。根据短文内容在空白处填入适当的单词。

　　It's Sunday morning．Many boys and girls are in the park．Some of them are singing under the tree, some are 　　1　　 in the river, other children are playing games behind the hill．

　　Maria is 　　2　　 American girl．She is in the park, too．Where is she? Oh, she is on the hill．What is she 　　3　　 over there? She is sitting and 　　4　　 a book．She likes reading very much．Tom is an English boy．He is five．He is too young．He can't go to school．Now he is 　　5　　 a kite with his father in the park．