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　　I used to love science class—all of them— 76.

　　biology, chemistry, geography or physics. I think I 77.

　　liked those classes because I felt that it helped me 78.

　　understand what the world works. For example, 79.

　　when I was a child, the rain was a mystery. In one 80.

　　class, I learned why it rained. I think science classes 81.

　　clear up mysteries. But then there is always more 82.

　　mysteries look into. What was my least favorite class? 83.

　　That was math. After learn the basics of the subject, 84.

　　Nothing else seemed very practically to me. I never 85.

　　saw how I could use it in my daily life.

　　短文改错练习(18)

　　Some Americans judge success on the length 76.

　　of his vacations . The man who gets a month’s 77.

　　vacation each year consider himself more successful 78.

　　than the man gets two weeks . Many people want 79.

　　to be teachers because it is teachers who can 80.

　　get three-month vacation every year . Some college 81.

　　teachers who teach the three classes consider 82.

　　themselves less successful than that who teach 83.

　　only one or two , or none in all . In short , the less 84.

　　work Americans do , the less successful they 85.

　　consider themselves .

　　短文改错练习(17)

　　76.class—classes 77.or—and 78.it—they 79.what—how 80.去掉the

　　81.√ 82.is—are 83.mysteries^—mysteries to 84.learn—learning 85.practically—practical

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　　76.on-by 77.his-their 78.consider-considers 79.the man-the man who 80.√

　　81.get-get a 82.删去the 83.that-those 84.in- at 85.less-more