【2013山东泰安】The food safety is a serious_______ in our country. We should try to solve it.
Some people don’t known the value of their health they lost it.
Amy prefers at home to out at the weekends.
I found him worth because he devoted all his time he had to people in need.
--- Do you know _______? I’m going to see him. --- Sorry,I don’t know.
Not only she but also Dick and I _______ interested in maths.