最近，很多中学生都纷纷开起了自己的博客。一方面，博客可以作为展示自己的窗口，
可以释放学习的压力，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博客要花相当多的时间和精力，会耽误学习。
请对这一现象进行简要介绍，并发表自己的看法。
注意：词数120左右
参考词汇：开博客open one’s blog
开头已给出：
Nowadays, it is a common phenomenon that more and more high school students open their own blogs on the Internet.
When you read the book, you' d better make a mark _____ you have any questions.
| A．at which | B．at where | C．the place | D．where |
We'd better hurry ______ it is getting dark.
| A．and | B．but | C．as | D．unless |
I didn' t manage to do it _____ you had explained how.
| A．until | B．unless | C．when | D．before |
_____ he comes, we won't be able to go.
| A．Without | B．Unless | C．Except | D．Even |
I hurried _____ I wouldn't be late for class.
| A．since | B．so that | C．as if | D．unless |