句型转换：
问题描述：
句型转换：
1、Joan can't sing and dance.（同义句转换）
Joan ( ) to sing and dance.
2、The snow was very heavy last night.（同义句转换）
It ( ) last night.
3、-The twins don't get up early at the weekend.(补全句子)
-( ) Mary.
答
don;t
is