问题 不定项选择题

下列对于淡水资源的认识中,正确的是[ ]

A.可供人类利用的淡水资源并不丰富

B.我国有多条大江大河和众多的湖泊,所以属于富水国家

C.每人每天约需2.5 kg水,因为人口急剧增加,地球上的淡水对满足人们的生活用水已很紧张

D.人类生活和生产需要大量淡水,同时人们又在严重污染着自然水源,所以保护水资源刻不容缓

答案

AD

完形填空

A farm is always a busy place. One of the busiest things is when the farmer is getting land ready to grow plants.

If the farmer is going to grow wheat, he has to turn the ground over first. The farmer drives up and down the paddock(草地) on tractor(拖拉机). When the ground is ready, the farmer sows the seeds. He does this with a machine that the tractor pulls along. Now, one farm and one machine can do as much a day as twenty men used to do without a machine. After the wheat has been sown, the farmer keeps a lookout(守望) for rain. Wheat needs rain and warm sunny days to make it grow. When the wheat has grown, it turns to a lovely golden colour.

When the wheat is fully grown, you can see the seeds on the wheat plants. These have to be out off and put in bags or big trucks to be taken to a factory where they are made into flour(面粉).

It’s a very busy time on farm when the wheat is being cut. Everyone helps so that all the wheat can be taken from the paddocks before the rain comes. If heavy rain falls, the farm must wait for the ground dry out before the machine can cut the wheat. Farmers always have a lot to do through the year.

1. What is the busiest thing?______________________________________________

2. What does the farmer have to do when he is going to grow wheat?_______________________

3. Why was much more time spent on sowing in the past?________________________________

4. What does farmer not need when they cut wheat?_________________________________

5. Does everyone help to cut the wheat?_______________________________________

单项选择题