1. 根据故事内容，判断句子正误。

Today is Lisa and Jeff's birthday. Their mum gives them 100 yuan. They can buy some books and toys.

They don't know what to buy. Finally, they decide(决定) to buy some gifts for their mum.

Jeff wants to buy a card.

Lisa wants to buy some flowers.

They give the gifts to their mum. Their mum is very happy.

1. （1） Today is Lisa and Jeff's mum's birthday.
3. （2） Lisa and Jeff decide to buy some gifts for their mum.
5. （3） The flowers are thirty yuan.
7. （4） The gifts are a book and some flowers.
9. （5） Lisa and Jeff are good kids.