读对话，判断句子正误。

Tom: Mum, look! It's raining(下雨) outside.

Mum: Oh, no! I don't like rainy days.

Tom: I like walking in the rain very much.  Let's go to the park.

Mum: OK. But I can't find my umbrella(伞). Where is it?

Tom: Is it on the desk?

Mum: No!

Tom: Is it behind the desk?

Mum: Yes, you are right.

Tom: Now let's go!