根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。

I worked in a shop three years ago. A girl started working there a few months after me. I met her often but we never t_1._. We just saw each o__2.__ and smiled.

She would always smile in a really happy way until one day when we got to work in the same department again. She smiled as if she was the h___3.___ girl in the world. I went up to her and asked, “What’s w___4.___ with you?” She answered, “Why?” I said, “I can feel you’re very sad but you’re always t___5.___ to hide it.” Her mouth just dropped as if I had discovered her deepest s___6.____, so we started talking. She told me why she was feeling like that and why she was trying to hide it. Time w__7.___ by and we became good friends. Later she said that I had changed her life in many w__8.__. Today this girl is one of my best friends. She has been there for me in every possible way a friend could be.

I guess what I’m trying to say is that you never know when you’re helping y___9.___. I helped this girl never knowing that at the same time I was helping myself by finding a t___10.___ friend.

Can you imagine a classroom without one thing that has long been considered a necessary part? No notebooks, no textbooks, no test papers. Nor are there any pencils or pens, which always seem to run out of ink at the critical moment.
A “Paperless classroom” is what more and more schools are trying to realize. Students don’t do any handwriting in this class. Instead, they use hand-sized or specially-designed computers. The teacher downloads texts from Internet libraries and sends them to every student’s personal computer.
Having computers also means that students can use the Web. They can look up information on any subject they’re studying, from maths to social science.
A high school teacher, Judy Herrel in Florida, US, described how her class used the Web. “Using a book that’s three or four years old is impossible,” she said.
A paperless classroom is a big step towards reducing the waste of paper.
“Think about the money and trees we could save with the computers,” she said.
But, with all this technology, there’s always a risk that the machines will break down. So, in case of a power failure or a technical problem, paper textbooks should still be widely available (可得到的) for these students.
【小题1】The underlined word “critical” in the first paragraph probably has the same meaning as _______.

用所给词的适当形式填空 ( 5分 )