1 It has been 5 years since we haven't met each other.
2 Boys ranging from 6 to 10 tend to be are usually quite naughty.
3 He failed to grasp the main idea of this article.
4 The agricultural development of the desert area will benefit greatly from this research finding.
5 It is reported that there will be momentous revolution in the aspect of medical treatment in China.
6 Participating in sporting events is one of the important apporaches of the banlance between work and rest.
希望帮到你噢^^
我托福很高分的 应该没问题