Question

【題目】Today there are 6.4 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 (轉基因的) foods, or GM foods.

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 foods 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 foods 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】There may be billion people by the year 2050 on the earth.

A. 6.4 B. 12.5 C. 18.5 D. 20.5

【2】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 planting environment. D. By changing their genetic material.

【3】Why do rich countries produce GM foods?

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.

【4】Which of the following is NOT true according to the passage?

A. GM plants are not natural.

B. GM plants are strong against plant diseases.

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

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

【5】What can we learn from the passage?

A. GM foods will go away one day in the future.

B. GM foods will not go away in the future.

C. People will not be interested in GM foods.

D. People will have to stop eating GM foods.

Answer 1

【答案】

【1】 B

【2】 D

【3】 A

【4】 C

【5】 B

【解析】

這篇短文主要講述轉基因問題。文章指出，轉基因可以使植物增強抗病能力，也可以對人類疾病有幫助。同時指出，轉基因植物非自然生長，其好壞尚不可知。

【1】細節(jié)理解題。根據(jù)第一段句子By the year 2050 there may be 12.5 billion．到2050年可能會有12.5億人。可知是12.5億人。故選B。

【2】細節(jié)理解題。根據(jù)第二段句子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（轉基因的） foods，自1983年以來，科學家已經(jīng)能夠更快地改變植物通過改變它們的遺傳物質。以這種方式生長的植物被稱為轉基因食品。可知通過改變他們的遺傳物質。故選D。

【3】細節(jié)理解題。根據(jù)倒數(shù)第二段句子Rich countries produce GM foods because they are easy to grow and bring in more money．發(fā)達國家生產(chǎn)轉基因食品，因為它們很容易成長，帶來更多的利潤。可知因為它們很容易成長，帶來更多的利潤。故選A。

【4】細節(jié)判斷題。根據(jù)最后一段句子No one knows how good or bad they are．沒有人知道它們有多好或者多壞。可知每個人都知道好的或壞的轉基因植物是錯誤的。故選C。

【5】細節(jié)理解題。根據(jù)最后一段句子But both rich and poor countries are interested in their use，and they are not going to go away．但富國和窮國對它們的使用是感興趣的，它們是不會消失的。可知它們不會消失（go away），相當于disappear，轉基因食品在未來不會消失。故選B。