1.at home with 对…..很熟悉
She is at home with problems like this.
2. back out
1) 退出
A: Wasn’t Bert supposed to sing tonight?
B: Yes, but he backed out at last minute
2)不履行
She finally backed out of her promise.
3. be cut out for 天生适合
I’m not cut out to be a hero.
4. be absorbed in
She has been absorbed in a horror fiction. I can’t tear her away.
5. be addicted to 对……上瘾
She has been addicted to drugs for years.
