用所给动词的正确形式填空

________ (keep) it straight, we must ________ (tie) the tree to the top of the stick.

你会植树吗？

　　1．The ground must be just right－neither too wet nor too dry. It's best to plant trees in spring because it's warm.

　　2．Dig(挖) a hole(坑) large enough for the tree. But the hole should not be too deep.

　　3．Knock a long, strong stick(木棒) into the earth next to the hole. Make sure that it is straight.

　　4．Put the tree in the hole. Make sure that it is straight.

　　5．Put the earth back in the hole again. Push it down hard with your foot several times.

　　6．Tie the tree to the top of the stick to keep it straight.

　　7．Water it well as often as possible.

用一个到两个动词词组概括种树的过程：

　　　 People believe that climbing can do good to health.Where can you learn the skill of climbing then? If you think that you have to go to the mountains to learn how to climb, you're wrong.Many Americans are learning to climb in city gyms.Here, people are learning on special climbing walls.The climbing wall goes straight up and has small holding places for hands and feet.

　　　 How do people climb the wall? To climb, you need special shoes and a harness (保护带) around your chest to hold you.There are ropes tied to your harness.The ropes hold you in place so that you don't fall.A beginner's wall is usually about 15 feet high, and you climb straight up.There are small pieces of metal that stick out for you to stand on and hold on to.Sometimes it's easy to see the next piece of metal.Sometimes, it's not.The most difficult point is to control your fear.It's normal for humans to be afraid of falling, so it's difficult not to feel fear.But when you move away from the wall, the harness and the ropes hold you, and you begin to feel safe.You move slowly until you reach the top.

　　　 Climbing attracts people because it's good exercise for almost everyone.You use your whole body, especially your arms and legs.This sport gives your body a complete workout.When you climb, both your mind and your body can become stronger.

(　　)6.According to the passage, if you want to do some climbing, you can ________.

A.go to the mountains　　　 B.stay in city gyms

C.stay at home　　　　　　 D.both A and B

(　　)7.The most difficult thing to do in wall climbing is ________.

A.to tie ropes to your harness　　　　　 B.to control your fear

C.to move away from the wall D.to climb straight up

(　　)8.If you are a beginner, you'd better ________.

A.climb high walls　　　　　　　　　 B.climb low walls first

C.not use a harness D.climb with friends

(　　)9.The underlined word “workout” in the last paragraph most probably means ________.

A.settlement B.exercise　　

C.excitement　 D.tiredness

(　　)10.What can we infer from the passage?

A.People are fairly interested in climbing nowadays.

B.It is impossible to build up one's body by climbing.

C.People can only learn the skill of climbing outdoors.

D.It is always easy to see holding places in climbing.