题目内容
—Oh, my God! My English book is nowhere to be seen.
—You __________ it at home.
A. should have left B. would have left
C. must have left D. could have left
C
【解析】
试题分析：考查情态动词和虚拟语气。句意：噢，天呐！我的英语书不见了。--你一定是把它遗留在家里了。情态动词+have done，表示对过去的事情进行虚拟，A本应该做某事；C一定已经做了某事；D本可以做某事，根据句意可知，这里表示肯定推测，用must have done，故选C。
考点：考查情态动词和虚拟语气
请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。(每个空格只填1个单词。)
Many people today are worried about the quality of the food they eat. This concern has led to an increasing number of organic products appearing on supermarket shelves. Many people refuse to buy products that contain artificial colorings or preservatives, or foods that come from genetically modified (GM) crops, fearing that these foods are unhealthy and can cause cancer and other diseases. Some advocates of genetically modified foods consider such attitudes unjustified. I am one of them, and in this essay I will try to justify why I think concerns about GM foods have little value.
First of all, GM foods have been around for almost 20 years. Contrary to the claims of those who oppose GM foods, there have not been any officially reported cases of such foods causing cancer or any other diseases. In fact, research into GM foods has been unable to confirm any harmful effects on human health whatsoever.
Secondly, not everyone can afford organic foods. Climate change and rising fuel costs have led to global increases in the price of food, and as a result, many poor people are spending more money on feeding themselves. Many can hardly afford to buy food. GM plants are generally more resistant to droughts, floods and pests, and have higher production per hectare（公顷）, which leads to more affordable food prices.
The world population keeps growing and is expected to reach eight billion by 2015. People in fast-developing countries such as India and China are consuming more energy and food. The only solution to the ever-increasing demand for food is to grow more GM crops. Unless scientists and governments come up with a better solution, GM foods are here to stay.
To conclude, people are free to eat the food of their choice, whether it is organic or not. However, I think that many people overlook major benefits of GM foods, and instead choose to focus on the unproven negative effects of such foods.
Phenomenon | Many people today are worried about the equality of the food they eat, and refused to buy products1. ________ artificial colorings and preservatives, or foods that come from GM crops. |
The author’s attitude | As an 2.________ of GM foods, the author consider 3.________ about GM foods of little value. |
4.________ for the author’s opinion | GM foods have come into 5.________ for almost 20 years. And there’s no 6.________ showing that GM foods have harmful effects on human health. Contrary to organic foods, GM plants are generally more resistant to natural 7. ________ and pests, and have higher production. As a result, more people can afford to buy GM foods. GM foods are the only8.________ to the increasing demand for food at present. |
9. ________ | People are free to choose what they eat. However, they should 10.________ on the major benefits of GM foods. |