当今，很多中学生都纷纷开微博。一方面，微博可以作为展示自己的窗口，以释放学习的压力，因此已经被越来越多的中学生所接受。但是，另一方面，很多家长和老师都认为管理个人微博要花相当多的时间和精力，会耽误学习。

请简要介绍这一现象，并发表自己的看法。

注意：词数100-120左右。

参考词汇： 开微博 open one's microblog

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----Are you going to Tom’s birthday party?

---- __________. I might have to work.

A. It depends B. Thank you

C. Sounds great D. Don’t mention it

Many people agree that __________ knowledge of English is a must in _________international trade today.

A. a; / B. the; the

C. a; an D. /; the

These tax laws, which are intended for domestic companies, do not ________ to foreign companies.

A. contribute B. apply C. lead D. summit

---- Is everyone here?

----Not yet. Look, there _______ the rest of our guests.

A. come B. comes

C. is coming D. are coming

____today, he would get there by Friday.

A. Would he leave B. Was he leaving

C. Were he to leave D. If he leave

Last year the number of students who graduated with a driving license reached 200,000, a(n) ________ of 40,000 per year.

A. amount of B. quantity

C. average D. number

— Believe it or not, my sister and I are twins.

— Oh, you must have had the case _________ you were taken for your sister.

A. which B. whose C. where D. when

---- They like going to sleep early, don’t they?

---- Yes. They are accustomed ___________ very late.

A. to stay up B. to not stay up

C. to staying up D. to not staying up

Many people can’t learn any lessons from the mistakes they’ve made __________ they get hurt somehow.

A. whether B. unless C. if D. as