Question

All our food comes from the soil(土壤). Some of us eat meat, but animals live on plants. If there are no plants, we will have no animals and meat. So the soil is necessary for us to live.

The top of ground is usually covered with grass or other plants. Plants grow in soil, which has a dark color. This dark soil is humus. Dead leaves, dead plants and animals’ waste make it, but this takes a long time. When the humus has been made, plants can grow well in it.

All soil needs food. If we don’t give it any, the plants will be weak. Animals’ waste is the best food for the soil, but chemical fertilizers (化肥) are also very useful. The same crop (莊稼) should not be grown in the same place every year; it is better to have a different crop. A change of crop and the use of a good fertilizer will keep the land in good condition.

When the soil is dry, the wind blows it away. Sometimes heavy rain carries the humus down to a river. People should grow more and more trees and grass to stop wind from carrying the humus (腐殖土壤)away. It takes hundreds of years to make humus, and so we must save every bit of it. Without soil, where can we grow food?

1. From the text, we know people live on ___________.

A. animal B. plant

C. meat D. soil

2. We should ___________ to keep the soil.

A. give more fertilizers

B. grow a different crop every year

C. make more humus

D. grow more trees and grass

3. We should save every bit of humus, because ___________.

A. it takes a long time to make humus

B. sometimes the wind will blow the dry soil away

C. the chemical fertilizers are expensive

D. animals waste is the best food for the soil

4.From the passage, we know that soil is ___________ to people.

A. not helpful B. necessary

C. not important D. harmful

 

Answer 1

1.D

2.D

3.A

4.B

【解析】

試題分析：這篇短文告訴了我們土壤的重要性。我們吃的所有食物都來源于土壤，植物生長在土壤之上。我們要注意節約土地，因為腐殖土壤的形成需要很長時間，我們要多種樹和草，防止腐殖土壤被風吹走。

1.推理判斷題。根據短文的開頭All our food comes from the soil 以及So the soil is necessary for us to live可知，我們人類吃的所有食物都來源于土壤，土壤對于我們來說是必要的。故選D。

2.細節理解題。根據短文第四段中People should grow more and more trees and grass to stop wind from carrying the humus (腐殖土壤)away可知，人們種植越來越多的樹和草是為了防止風把土壤吹走。故選D。

3.細節理解題。根據短文第四段中It takes hundreds of years to make humus, and so we must save every bit of it可知，需要花費幾百年的時間，才會形成腐殖土壤，所以我們必須節約每一寸土地。故選A。

4.主旨大意題。根據全文的大意以及短文第一段的最后一句話可知，土壤對于我們人類來說是必要的，我們吃的食物來源于土壤，所有的植物都長在土壤之上。故應該選B。

考點：科普類短文閱讀。