Question

【題目】 Today there are about 7.5 billion people on the earth. By the year 2050 there may be 12.5 billion. There are many people to feed. We need more and more food.

One way to produce more food is growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983,scientists have been able to change plants more quickly by changing their genetic( 遺傳的) material. Foods from plants grown in this way are called genetically modified food, or GM food.

By changing the genetic material of a plant, it is possible to make new plants. Scientists make plants which are strong against plant diseases. They can also help in our diseases.A kind of rice will be grown, for example, which stops people becoming blind.

Rich countries produce GM food because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.

GM plants are not natural. No one knows how good or bad they are. Making GM food is only one way of feeding people in 2050.There are strong feelings against them because they are unnatural. They may feed people, then hurt them or their children later. But both rich and poor countries are interested in their uses, and they are not going to go away. In 2050,we may think differently about them.

【1】How have scientists been able to change plants more quickly?

A.By making the best plants.

B.By asking the farmers to grow plants.

C.By changing their genetic material.

D.By changing planting environment.

【2】Why do rich countries produce GM food?

A.Because they are easy to grow and bring in more money.

B.Because they are easy to grow and very cheap.

C.Because they help produce more food.

D.Because they are the best plants.

【3】What’s the meaning of “GM” in the second paragraph?

A.傳統(tǒng)B.非轉(zhuǎn)基因C.自然D.轉(zhuǎn)基因

【4】What can we know according to the passage?

A.GM plants are natural.

B.GM plants are weak against plant diseases.

C.Everyone knows how good or bad GM plants are.

D.GM food may hurt people or their children later.

Answer 1

【答案】

【1】C

【2】A

【3】D

【4】D

【解析】

這篇短文主要講述了基因問題，轉(zhuǎn)基因可以使植物增強(qiáng)抗病能力，也可以對人類疾病有幫助，同時指出，轉(zhuǎn)基因植物非自然生長，其好壞尚不可知。

【1】細(xì)節(jié)理解。根據(jù)文中“Since 1983,scientists have been able to change plants more quickly by changing their genetic( 遺傳的) material.” 自1983年以來，科學(xué)家通過改變植物的遺傳物質(zhì)，能夠更快地改變植物。故選C。

【2】細(xì)節(jié)理解。根據(jù)文中“Rich countries produce GM food because they are easy to grow and bring in more money.” 發(fā)達(dá)國家生產(chǎn)轉(zhuǎn)基因食品是因?yàn)樗鼈內(nèi)菀追N植，并能帶來更多的資金。故A。

【3】詞句猜測。根據(jù)上文“Foods from plants grown in this way are called genetically modified food” 以這種方式種植的植物被稱為轉(zhuǎn)基因食品，可知下文中“GM food”的意思是“轉(zhuǎn)基因食品”。故選D。

【4】推理判斷。根據(jù)文中“There are strong feelings against them because they are unnatural.” 人們對轉(zhuǎn)基因食品有強(qiáng)烈的反感，因?yàn)樗鼈兪遣蛔匀坏摹？芍�選項(xiàng)A“GM plants are natural.”說法錯誤；根據(jù)文中“Scientists make plants which are strong against plant diseases.” 科學(xué)家制造的植物對植物疾病有很強(qiáng)的抵抗力�？芍�選項(xiàng)B“GM plants are weak against plant diseases.”說法錯誤；根據(jù)文中“GM plants are not natural. No one knows how good or bad they are.” 轉(zhuǎn)基因植物不是天然的。沒人知道它們有多好或有多壞�？芍�選項(xiàng)C“Everyone knows how good or bad GM plants are.”是錯誤的；根據(jù)文中“They may feed people, then hurt them or their children later.” 它們可能喂飽人們，然后傷害他們或他們的孩子�？芍�選項(xiàng)D“GM food may hurt people or their children later.”說法是正確的。故選D。