写出动词形式
问题描述：
写出动词形式
1 b___:look after small children or babies
2 c___:people get together somewhere,do something interesting or have fun.
3 s___:give someone something like postcard,letter through the post office.
4 h___:go on a tirp on foot.
5 p____:something you think you are going to do.
答
1 baby-sit
2 celebrate
3 send
4 hike`
5 plan