动词填空（共10题，每小题0.5分，共5分）
1. The 8,892-kilometre-long border is said to be the longest border in the world not __________ (defend) by an army
or the police.
2. I am sure that the people in the disaster areas are on their way to__________ (live) a better life.
3. With all the cartoon books I needed__________ (buy), I left the bookstore.
4. The little girl, who has been spoiled has got used to __________(offer) everything she needs.
5. After getting lost, the hiker spent several days walking through wild, lonely countryside before__________.(find)
6. It is such a small problem that it is hardly worth __________ (trouble) about.
7. I’d be the first__________ (admit) that I might be wrong.
8. One aim of genetically modified research is__________ (produce)food which will make us healthier.
9. At first he refused to accept any responsibility but he ended up __________.(apologize)
10.__________(expose)to lead does great harm to children’s learning ability.