题目内容
Our food ________ .So we’d better go home to fetch some.
- A.has run out
- B.had run out
- C.is run out
- D.has run out of
试题分析:考查时态。句意:我们的食物已经用完了。所以我们最好回家取拿一下。现在完成时表示过去发生的事情对现在的影响,本题中过去食物用完了是过去发生的事情,对现在的影响就是我们现在要回家拿。故A正确。
考点:考查时态
点评:现在完成时的时态中考查的重点,现在完成时表示过去发生的事情对现在的影响,或者过去发生的事情延续到现在;而一般过去时只表示过去发生过某件事情,不表示对现在的影响。
Nearly all our food comes from the soil. Some of us eat meat, of course, but animals live on plants. If there were no plants, we would have no animals and no meat. So the soil is very necessary for life. The top of the ground is usually covered with grass or other plants. There may be dead leaves and dead plants on the grass. The waste matter (粪) from animals also falls on it.
All soil needs food. If we do not give it any, the plants will be weak. Farmers found that animals’ waste is the best food for the soil, but chemical fertilizers (化肥) are also very useful. The same crop (庄稼) should not be grown in the same place every year; it’s better to have a different crop. A change of crop and the use of a good fertilizer will keep the land good.
【小题1】What would happen first without plants?
| A.People would have more crops. | B.Animals would die. |
| C.There would be more food. | D.There would be less soil. |
| A.Leaves, plants, grass and waste live on each other. |
| B.There would be no animals without meat. |
| C.There would be no plants without animals. |
| D.People, animals, plants and soil live on each other. |
| A.Chemical fertilizers | B.Plants and grass. | C.Animals’ waste. | D.Different crops. |
| A.Because we can keep the soil rich this way. |
| B.Because we don’t have enough land. |
| C.Because we want to have a different food. |
| D.Because we do this as a habit. |
| A.Soil and Waste | B.Plants and Animals | C.Food and Waste | D.Soil and Food |