Question

【題目】There is little rain in desert. Because deserts are so dry, they have no “quilt” to help stop the soil from going away. As a result, they may get very hot during the day with the sun shining, but don’t hold the heat overnight. Many deserts can quickly get cold once the sun goes down. Some deserts can reach temperatures of over 100 degrees F during the day and then drop below freezing (32 degrees F) during the night.

The largest hot and dry desert in the world is the Sahara Desert in Northern Africa. The Sahara is a sandy desert with great sand hills. It covers over 3 million square miles of Africa. Other large deserts include the Arabian Desert in the Middle East, the Gobi Desert in Northern China and Mongolia, and Kalahari Desert in Africa.

Animals that live in the desert are also used to needing little water. Many get all the water they need from the food they eat. Other animals keep water that they can use later. The camel stores up fat in its hump while other animals keep something they need in their tails.

Only certain types of plants can live in the terrible environment of the desert. You won’t see a lot of tall trees in the desert. Most plants have a way to keep water in their leaves, or trunks so they can live a long time without water.

Now deserts cover around 20% of the world’s land, but they are growing. This is called desertification and is caused by different reasons including human activities. The Sahara Desert is growing larger and larger each year. What should we do with it ?

【1】How is the weather during the night in the desert?

A. Hot. B. Cold. C. Cool.

【2】Where does the camel store up fat?

A. In its hump. B. In its stomach. C. In its tail

【3】Why won't we see a lot of tall trees in the desert?

A. Because of few people there.

B. Because of the sun shining.

C. Because of the terrible environment

【4】How much of the land do deserts cover in the world?

A. One fifth. B. Less than 10%. C. Two fifths

【5】Is the Sahara Desert growing or not?

A. Nobody knows it.

B. It's growing.

C. It's not growing.

Answer 1

【答案】

【1】B

【2】A

【3】C

【4】A

【5】B

【解析】

試題分析：本文講述的是與沙漠相關(guān)的知識：白天炎熱，夜間寒冷；世界主要的大沙漠：撒哈拉沙漠、阿拉伯沙漠、戈壁沙漠；沙漠上的動物特點：需要較少的水而且可以儲存水；沙漠的植物特點等等。

【1】B 細(xì)節(jié)題解題。題意：沙漠夜間的天氣怎樣？A. Hot熱；B. Cold.寒冷；C. Cool.涼爽。根據(jù)第一段最后一句：Some deserts can reach temperatures of over 100 degrees F during the day and then drop below freezing (32 degrees F) during the night.可以知道沙漠白天氣溫可達(dá)100度以上，而夜間可以降到冰點以下。故其夜間寒冷。故選B。

【2】A 細(xì)節(jié)理解題。題意：駱駝在哪兒儲存脂肪？A. In its hump.在駝峰里；B. In its stomach.在胃里；C. In its tail在尾巴里。由第三段最后一句里的：The camel stores up fat in its hump可知駱駝把脂肪儲存在駝峰里。故選：A。

【3】C 細(xì)節(jié)題解題。題意：為什么我們在沙漠里看不到許多高樹？A. Because of few people there.因為那兒人很少；B. Because of the sun shining.因為太陽曬；C. Because of the terrible environment因為恐怖的環(huán)境。由第四段第一句：Only certain types of plants can live in the terrible environment of the desert.可知沙漠里的環(huán)境不適合很多植物生長。故選：C。

【4】A 細(xì)節(jié)理解題。題意：世界上沙漠覆蓋了多少陸地？A. One fifth.五分之一；B. Less than 10%.不到10%；C. Two fifths五分之二。根據(jù)最后一段的第一句：Now deserts cover around 20% of the world’s land可知，沙漠覆蓋了陸地的20%。20%＝1/5.故選A。

【5】B 細(xì)節(jié)理解題。題意：撒哈拉沙漠在增長還是沒有？A. Nobody knows it.沒有人知道；B. It's growing.在增長；C. It's not growing.沒有增長。由最后一段里的：The Sahara Desert is growing larger and larger each year.可知，撒哈拉大沙漠正變得越來越大。故回答：It’s growing。選B。