Read the dialogue and choose the right answer.

Belinda: Hi, Amy. Let’s go to the bookstore! I’ve just got a discount voucher.

Amy: I am sorry. I have a lot of work to finish. I am afraid I can’t manage it.

Belinda: Well, you should finish it all, then. You can ask me anything if you need help.

Amy: Thank you, Belinda. Why don’t you go there with Niki? She likes reading. She will be happy if you ask her to go with you.

Belinda: That might be worth trying! I will call her.

The underlined sentence is an expression of ...