When people cut down big trees, new trees sho...

When people cut down big trees, new trees should be planted. 　　 ,they will have no trees to cut down in the future.

A.If not B.If so C.If no so D.If don’t

高二英语单项填空中等难度题查看答案及解析

It happens in plants when gardeners take cuttings from growing plants to make new ________ .

高二英语单项填空简单题查看答案及解析

.People have planted a great many trees in order to _____ wind and sand in the desert.

高二英语单项填空简单题查看答案及解析

People have planted a great many trees in order to ________ wind and sand in the desert.

A．hold down        B．hold up          C．hold back        D．hold out

高二英语单项填空中等难度题查看答案及解析

People should ______the traffic rules when they travel to a new place. Nobody can be exception.

A. perform　　　　 B. observe

C. possess　　　　 D. support

高二英语单项填空中等难度题查看答案及解析

Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain．

A．number; has                          B．amount; has

C．quantity; have                           D．sum; have

高二英语单项填空困难题查看答案及解析

When many people think about planting a tree, they do not realize that there are several things that they need to consider. You can’t simply just dig a single hole, throw the tree into that space, and expect it to grow without any disease. 1.

The first thing that you need to take into account is the time of year that you are looking to plant the tree in. Believe it or not, in order to plant a tree that will stay alive and be able to survive, you have to plant it at the time of year that is right for the tree. 2. The burning sun during these periods of time will cause a big amount of stress of the tree, which will then lead to its death. 3.

4. You should choose a suitable region and climate for the tree. If you decide to plant a tree that is not a native of a particular climate, you need to consider different factors about the tree such as the growth habits of the tree and how much tolerance the tree has to different weather conditions.

5. Sometimes in cases where people will be digging deep holes to plant a tree, they need to make sure that they are not digging around the phone lines that may be buried below the surface. Among other things, the hole determines if the tree can survive.

A. Normally you should never plant a tree in late spring or summer.

B. When digging a hole for a tree, you’d better dig as deep as possible.

C. You should then look at the place where you plan to plant the tree in.

D. The best time to consider planting your tree is around autumn or early spring.

E. The tree will not only be planted but will continue to grow well for years to come.

F. The next thing that you need to know is whether there are requirements where you’ll dig.

G. There are a few basic things that you need to do in order to make sure the tree grows healthily.

高二英语七选五中等难度题查看答案及解析

Scientists have suggested a solution to cutting down greenhouse effect: planting an area ________ the US with trees, which, when mature, would consume as much carbon dioxide as is being released.

A.of the size of B.the size of C.as the same size as D.the same size of

高二英语单项填空中等难度题查看答案及解析

Trees should only be pruned (修剪) when there is a good and clear reason for doing so and , the number of such reasons is small. Pruning involves the cutting away of overgrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way.

First, pruning may be done to make sure that trees have desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches, which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus cause wounds. The health of a tree may be encouraged by removing branches that are blocking up the center and so preventing the free movement of air.

One result of pruning is that an open wound is left on the tree and this provides an easy entry for disease , but it is a wound that will heal (愈合). Often there is a race between the healing and the disease as to whether the tree will live or die, so that there is a period when the tree is at risk. It should be the aim of every gardener to reduce that risk of death as far as possible. It is important to make the area, which has been pruned, smooth and clean, for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hours and then paint it with one of the materials available from garden shops produced especially for this purpose. Pruning is usually done in winter , for then you can see the shape of the tree clearly without interference (妨碍) from the leaves and also it is very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly .

1.．Why should pruning be done?

A．To make the tree grow taller.        B．To improve the shape of the tree.

C．to get rid of the small ranches .    D．To make the small branches thicker.

2.．Trees become unhealthy if the gardener__________.

A. giving a tree a special shape and a definite height

B. removing small side branches and making a tree look less thick

C. allowing too many branches to grow in the middle

D. having a tree surrounded by many other trees

3.．Why is a special material painted on the tree?

A．To help a wound to dry.      B．to cover a rough surface.

C．To make a wound smooth.      D．To prevent disease entering a wound.

4.．A good gardener prunes a tree _________ .

A．several times throughout the year    B．as quickly as possible

C．occasionally when necessary          D．regularly every winter

5.．What was the author’s purpose when writing this passage?

A．To discuss different methods of pruning.

B．To introduce some common knowledge of pruning.

C．To explain how trees develop disease.

D．To give practical instruction for pruning a tree.

高二英语阅读理解简单题查看答案及解析

— I promise Shirley　　　　　 get a new iPad on her birthday.

— Will it be a big surprise to her?

A. should　　　　　　 B. must　　　　 C.would　　　　　　　　　 D. shall

高二英语单项填空中等难度题查看答案及解析