【文章大意】本文讲述的是攀岩这项运动，它是一项很难的运动，不仅体现在身体上还体现在智力上。据说攀岩75%靠腿力25%靠臂力，要想成功地攀岩还需要完美的技巧。

　　56. What does the author think of rock climbing?

　　A. It is an easy sport.

　　B. It is challenging.

　　C. It is quite dangerous.

　　D. It is extremely difficult.

　　57. While climbing, it is much easier for a rock climber if he ________.

　　A. takes a rope

　　B. has a partner

　　C. has three points touching the wall

　　D. uses feet more often

　　58. ________ will make rock climb easier.

　　A. Keeping the body closer to the wall

　　B. Resting more often on the arms

　　C. Resting more often on the feet

　　D. Pushing forward without thinking of the problems

　　阅读理解A篇

　　Although men and women have been growing crops for thousands of years, they have not always had enough to eat. Even today, many people in the world go hungry, and even die of hunger. If we are to grow enough for everybody, we have to grow more crops and better crops.

　　Plants need the right food in order to grow. In particular, they need three chemical substances (物质) in the soil: nitrogen (氮), phosphorus (磷) and potassium (钾). They also need smaller amounts of other chemical substances like calcium. If there is too little of any of these substances in the soil, plants can’t grow well.

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