题目内容：

    It was 1. first biology class. The teacher wanted to give a good start to her class. She wanted to open up her students’2.(eye) to the world of biology. She knew that teaching those young students was not easy, 3.she worked hard and tried to find a good way to teach them. After 4.(think) a long time, she had an idea. She decided 5.(show) the children something interesting and give them a lesson at the same time.

She asked her students to watch 6.(careful). Then she began. She put a worm into a glass of water. The worm 7.(swim) around in the water then she put a 8.(two) worm into a glass of alcohol(酒精). It was killed 9. a few minutes. She asked the students what they learned from it. A boy answered, “you showed 10.(we) that if we drank alcohol we wouldn't have worms in our stomachs.”