主題語境十四：自然

Ⅰ.閱讀理解

體裁：說明文 篇幅：2 9 8 建議用時：6分鐘文本來源：2 0 1 7·全國甲卷 新穎度：★★★★ 主題意義：植物受到攻擊時的自我保護

When a leafy plant is under attack,it doesn't sit quietly.Back in 1983,two scientists,Jack Schultz and Ian Baldwin,reported that young maple trees getting bitten by insects send out a particular smell that neighboring plants can get.These chemicals come from the injured parts of the plant and seem to be an alarm.What the plants pump through the air is a mixture of chemicals known as volatile organic compounds,VOCs for short.

Scientists have found that all kinds of plants give out VOCs when being attacked.It's a plant's way of crying out.But is anyone listening?Apparently.Because we can watch the neighbors react.

Some plants pump out smelly chemicals to keep insects away.But others do double duty.They pump out perfumes designed to attract different insects who are natural enemies to the attackers.Once they arrive,the tables are turned.The attacker who was lunching now becomes lunch.

In study after study,it appears that these chemical conversations help the neighbors.The damage is usually more serious on the first plant,but the neighbors,relatively speaking,stay safer because they heard the alarm and knew what to do.

Does this mean that plants talk to each other?Scientists don't know.Maybe the first plant just made a cry of pain or was sending a message to its own branches,and so,in effect,was talking to itself.Perhaps the neighbors just happened to “overhear” the cry.So information was exchanged,but it wasn't a true,intentional back and forth.

Charles Darwin,over 150 years ago,imagined a world far busier,noisier and more intimate(親密的)than the world we can see and hear.Our senses are weak.There's a whole lot going on.

1.What does a plant do when it is under attack?

A.It makes noises. B.It gets help from other plants.

C.It stands quietly. D.It sends out certain chemicals.

2.What does the author mean by “the tables are turned” in paragraph 3?

A.The attackers get attacked.

B.The insects gather under the table.

C.The plants get ready to fight back.

D.The perfumes attract natural enemies.

3.Scientists find from their studies that plants can _______.

A.predict natural disasters B.protect themselves against insects

C.talk to one another intentionally D.help their neighbors when necessary

4.What can we infer from the last paragraph?

A.The world is changing faster than ever. B.People have stronger senses than before.

C.The world is more complex than it seems. D.People in Darwin's time were more imaginative.

Ⅱ.完形填空

體裁：記敘文 篇幅：2 6 2 建議用時：1 7分鐘文本來源：2 0 1 9·全國丙卷 新穎度：★★★★ 主題意義：挪威山谷小鎮R j u k a n迎來冬日第一束陽光

The small town of Rjukan in Norway is situated between several mountains and does not get direct sunlight from late September to mid-March—six months out of the year.

1.A.only B.obviously C.nearly D.precisely

2.A.fear B.believe C.hear D.notice

3.A.empty B.blue C.high D.wide

4.A.cloudy B.normal C.different D.warm

5.A.helped B.changed C.happened D.mattered

6.A.computers B.telescopes C.mirrors D.cameras

7.A.remembered B.forecasted C.received D.imagined

8.A.repair B.risk C.rest D.use

9.A.forbids B.directs C.predicts D.follows

10.A.day B.night C.month D.year

11.A.library B.hall C.square D.street

12.A.appeared B.returned C.faded D.stopped

13.A.driving B.hiding C.camping D.sitting

14.A.pictures B.notes C.care D.hold

15.A.new B.full C.flat D.silent

16.A.block B.avoid C.enjoy D.store

17.A.Instead B.However C.Gradually D.Similarly

18.A.nature-loving B.energy-saving C.weather-beaten D.sun-starved

19.A.big B.clear C.cold D.easy

20.A.trying B.waiting C.watching D.sharing

Ⅲ.語法填空

體裁：說明文 篇幅：2 8 5 建議用時：7分鐘文本來源：原創 新穎度：★★★★ 主題意義：保護土地

When man starts his work in nature,the balance is likely 1._______（destroy）.He grows a crop and takes it away to eat;then there are no dead leaves to fall on the ground,holding water while it sinks into the surface.2._______

a farmer acts with knowledge and skill,he is therefore most likely to make the land 3._______

(bad)year by year.4._______(take)the place of the useful matter in the crops that he removes,he uses some kind of fertilizer.In some places,it is a habit to burn waste material lying about,but such burning destroys the useful matter 5_______._the plants need to grow.Although the ashes that are left are valuable when put on the land,a better practice is to bury the waste so that it decays and increases the humus(腐殖質)in the soil.

In the past,when the world population was much less than it is now,a man had little difficulty 6._________(grow)the food that was needed.When a field had been used for some years and had become tired,the farmer could move to another place.The tired land then slowly recovered.Gradually grasses and other plants would appear on it and its 7._______（produce） power would slowly return to normal through their decay.But nature,8._______(leave)alone,would take a long time to bring back the land to its former state;the 9._______(long)of time required would depend on local conditions,but it might well be ten years.

Anyway,it is a bad practice to grow the same crop in a field year after year and is man's responsibilities to find solutions 10._______the problem of soil protection.

Ⅳ.書面表達

請根據下面的提示寫一篇短文，介紹颶風（hurricane）的一些基本知識。

颶風發生的時間 多數出現在夏季與人類的關系 可以給很多地區帶來充足的雨水，與人類生活關系密切對人類的影響1.颶風具有突發性強、破壞力大的特點,是世界上最嚴重的自然災害之一2.颶風所引起的暴雨會造成洪澇災害，淹沒城鎮和農田，造成大量人員傷亡和財產損失政府的做法 ……

注意：

1.詞數100左右；

2.可以適當增加細節，以使行文連貫。