1.So as to make themselves more popular or to win some prizes.

2.Satisfying readers` taste and curiosity(好奇心)

3.The overuse of plastic bags is always a major problems in China.

4.Convenient as they are for customers, they have become a threat to the environment and a cause for severe(严重的) waste of resources.

5.Some of them even cut down the expending for books and meals to satisfy their desire for fashionable dress.

6.Some of them even fail to focus on their study,

7.Before I realize it, my second semester(学期)at college has elapse(流逝) and a new one is drawing near, which means I have to make another set of plans.

8.I might be faced with obstacles when(+doing)……for lack of experience,but I`m sure God helps those who help themselves.

9.An increasing number of reporters make up false stories about……

10.The reasons are simple but thought-provoking(令人深思的)

11.However, in recent years, the 4-hour show is losing its appeal, especially to youngsters.

12.Besides , it is a costly hobby to follow the tide,which will impose(使…强迫接受) financial stress on their parents.