2）不履行：She finally backed out of her promise.

17， be cut out for 天生适合

I’m not cut out to be a hero.

18， be absorbed in

She has been absorbed in a horror fiction. I can’t tear her away.

19， be addicted to 对……上瘾

She has been addicted to drugs for years.

20，be attached to 对……有感情

A: I’m amazed that you are still driving that old car of yours. I thought you would have gotten rid of it years ago.