阅读下面短文，掌握其大意，然后从各题所给的四个选项(A、B、C和D)中，选出最佳选项。
Years ago, if a teenager had some problems in her life, she might go home and write in her diary．Now, a teenager with 1 problems might go onto the Internet and write about them in a blog(博客)．In many ways, a diary and a blog are very 2 ．So, what makes blogging different from writing in 3 diary?
The biggest difference is that blogging is much more 4 than a diary．Usually, a teenager treats her diary like a book full of 5 that she does not want to 6 ．
It’s interesting that someone who writes in a blog 7 a diary will probably write nearly the same information．
I have a little sister, and sometimes I go online to read her 8 ．She writes about things like waking up early for swimming practice and not studying enough for her chemistry test． 9 I was her age, I wrote about the same things, but 10 in my diary．Then, after I had finished writing, I would hide my diary in a secret place because I was 11 that my sister might read it!
The biggest 12 with blogging is that anyone can read what you write．If I was angry with a friend during high school and wrote something 13 about her in my diary, she would never know． 14 , if my sister ever wrote something bad about a friend, that friend 15 read her blog and get angry．
There are also 16 to blogging, of course．If I was feeling sad one day and wrote in my diary, “Nobody cares about me,” 17 would know about it．However, if my sister wrote the same sentence in her blog, her best friends would 18 respond(回应)and tell her how much they 19 her．Blogs help people 20 in contact with their friends and to hear what the people around them are doing．
