1．Expanding (扩展) your knowledge by reading more books is a wise choice.
2．A bird was caught in the net，struggling (努力；挣扎) to escape.
3．He regretted (后悔)that he was careless and didn't pass the exam.
4．The method of reducing(减少)the teaching cost has been discussed at the meeting.
5．It is very modern and about 80 percent of its products export (出口)to foreign countries.
6．With all his attention focused(集中精力)on his experiment，he has no time to spend with his family.
7．Such comments(评论)seem to suggest Kahlo had a big influence on the art world of her time.
8．Great changes have taken place in the first two decades(十年) of the 21st century in China.
