用所给动词的适当形式填空。
1．I’m hungry now．I ________ （not eat）my breakfast．
2．It’s useful for people ________ （take）care of the environment．
3．When I passed his room I heard him ________ （sing）an English song．
4．I ________ （watch）TV at 7:00 yesterday evening．
5．The book ________ （seem）very interesting．The boy likes it very much．
6．I’m glad ________ （see）you again．
7．Thank you for ________ （tell）me about what you like．
8．The USA is a very big country ________ （visit）．
9．Come on，better get ________（go）．
10．I’m enjoying ________ （learn）English．