短文改错。
      请按下列情况改错。
     该行多一个词：把多余的词用斜线（／）划掉，在该行右边横线上写出并划掉。
     该行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
     该行错一个词：在错词下画一横线，在该行右边横线上写出该改的词。
     该行若无错误：在该行右边横线上画一个勾。

How time flies! It is 2 years after I came      to NO 1 middle school. In the past, I was used to   spend much time on computer games and was tired    my studies. As the result, I fell far behind     another students in my class. How I regretted     wasting so much time. Losing time can never      be returned. Now I was trying hard to do all      I can to catch up with my classmate. I am sure    you will make great progress and my dreams      will be come true in the near future.	1______ 2______ 3______ 4______ 5______                                6______ 7______ 8______ 9______ 10______
1. after-Since   2. 去掉was   3. tired后加of   4. the-a   5. another-other 6. losing-lost   7. was-am   8. classmate-classmates   9. you-I   10. 去掉be
People all over the country felt shocked _____ they heard of the news _____ eight children were killed at the school gate.
A. the moment, that B. when, which C. immediately, / D. the second, what
Why not stay at home _____ the road is so slippery after the heavy snow?
A. when B. unless C. even if D. now that
_____ he changes his mind, I won"t promise to help him.
A. Unless B. If C. Though D. Since
A dozen ideas were considered _____ the architect decided on the design of the building.
A. before B. because C. whether D. unless
—Have you known each other for a long time? —Not very, ______ we started to study in this middle school.
A. when B. since C. after D. before