______ the paper on the computer, the electricity was suddenly cut off.

He was about to jump into the river ________ his mother stopped him.

She was very hardworking ________he was very lazy.As a result，she passed the examination，but he
failed.

I was just about to jump into the river________the guide stopped me saying "Dangerous"．

The days are fast coming ______ watching films by using the web is a routine.

______, I believe, and you will find the boy is very outgoing.

短文改错
     Although we may not realize it,  but when we talk with others we make ourselves understand not just
by words.We send messages to the people around us also by our expressions and body movement.A
smile and a handshake shows welcome.Wave one's hand is to say "Goodbye". Nodding head means
agreement when shaking it means disagreement.These gestures are received both by Chinese and English
speakers as having the same meaning.But not all body language means the same thing in different country.
Take nodding the head for example.In some Asia countries it means not "Yes" but "No".
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Just call me whenever you are in trouble ______ I'll come to help you immediately.  

改错
     假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处错误。错误涉及一个单词的增加、删除或修改。
     删除：把多余的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉。
     增加：在缺词处加一个漏字符号(∧)，并在其下面写出该增加的词。
     修改：在错的词下划一横线，并在该词下面写出改正的词。
     注意：1. 原行没有错的不要改；2. 只允许修改10处，多者(从第11处起)不计分。
     Mr. Li is a well-known doctor in our city. Kind but patient, he is always ready to do what he can help
his patients. One day he learned from the medical magazine that patients will feel more pain if pleasant
music is played to them. Soon he got an office in his own. So he decided to have beautifully music playing
in his waiting-room. However, on one morning, an old lady who was sitting in the crowded waiting room
became angry while listen to the music. She said, "We were all waiting to see the doctor, but he's just
playing the violin in his office instead of doing her work."
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John was studying in his room __________ he heard screaming.