题目内容：

句型转换

1.Li Lei had to look after her pet last Sunday. (改为否定句)

Li Lei __________  __________ to look after her pet last Sunday.

2.I can’t leave my sister alone, she is too young.（改为同意句）

I can’t leave my sister _________ _________ , she is too young.

3.How old were you when I first saw you? （改为同意句）

How old were you when I saw you _______  _______  _________  ________?.

4.Hurry up, or you won’t catch the early bus. （改为同意句）

_____  ______  ______ hurry up, you won’t catch the early bus.

5.A kangaroo runs so fast that it can catch up with a train. （改为同意句）

A kangaroo runs _______  _______  ________ catch up with a train.