选择所给词语的适当形式填空
let's what's isn't aren't don't i'm who's can't
1、( )in Class 1,Grade 4.
2、( )your name,please?
3、These ( ) apples.They are pears.
4、( )go swimming,OK?
5、--Where is Tom?
--sorry,I ( )know.
6、--( )that girl?
--She is Mary.
7、Where are my glasses?I( ) find them.
8、Lulu( )at home today.