Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount-- but not the quality -- of foods grown in commercial farming areas.
Natural foods also include animals which have been allowed to feed and move freely in healthy pastures. Compare this with what happens in the mass production of poultry: there are battery farms, for example, where thousands of chickens live crowded together in one building and are fed on food which is little better than rubbish. Chickens kept in this way are not only tasteless as food; they also produce eggs which lack important vitamins.
There are other aspects of healthy eating which are now receiving increasing attention from experts on diet. It is significant that nowadays fiber is considered to be an important part of a healthy diet. In white bread, for example, the fiber has been removed. But it is presented in unrefined flour and of course in vegetables. It is interesting to note that in countries where the national diet contains large quantities of unrefined flour and vegetables, certain diseases are comparatively rare. Hence emphasis placed on the eating of whole meal bread and more vegetables by modem experts on "healthy eating."
According to this passage, people becoming interested in natural foods because ______.
A. they are getting fired of processed foods
B. they want to change their eating habits
C. a lot of the foods they eat is not healthy
D. food experts recommend them to have natural foods
"What was in the letter?" "I don't know. I didn't like ______ it as it wasn't addressed to
A. to open
B. opening
C. open
D. opened
Compared with the robot, the human worker is undoubtedly superior. He is capable of performing a wider variety of work.
Moreover, he is able to adapt his working pattern in order to cope with changing situations which the robot cannot do. On the other hand, the human worker is relatively weak and cannot tolerate work in extreme conditions such as extremely high or low temperatures.
Consequently, we find humans and robots working together in many areas of work. Robots are used to perform. dangerous tasks so that their human operators need not risk their lives. To handle harmful radioactive materials, such as uranium (铀), robots in the form. of machined arms are used so the human operators can stay from the fatal rays.
Another advantage of the robot is that it never complains about long working hours or that it is boring. It works around the clock and performs equally well in any situation. It needs little servicing and absolutely no holidays. That is why many of them are used to replace human workers for simple and repetitive jobs. The car manufacturers, for example, were amongst the first to use robots to replace workers working on the assembly line. They take over such boring tasks as tightening nuts and screws and spraying paint. Released from these unrewarding tasks, the human worker can be trained for more fulfilling posts, where he can make full use of his ability and get satisfaction from them. The management, on the other hand, will also benefit from these "human pretenders" as they form. a new work force which is able to produce more at a lower cost.
Looking to the future, we can expect tomorrow's robots to be even more "intelligent" than those of today.
Humans and robots worked together in many areas of work because ______.
A. robots never complain about the tiring work
B. the management can pay little and benefit a lot
C. it is dangerous for humans to do some harmful work
D. they have their own weaknesses and advantages
A great deal of the【43】and the listening that occurs【44】casual circumstances may seem to be【45】, in the sense that the discourse is relaxed, relatively formless, and expressive of strong and intimate feelings.【46】, such speaking and listening are highly valued. Normal individuals dread being deprived【47】companionship. If required to be【48】for a time, they may mm on the【49】or television, not to learn something,【50】not even to be entertained,【51】to feel the sociability of hearing human speech. The【52】purpose of much speech (including most【53】and many public speeches) is to knit together【54】closely and more pleasantly the ties of【55】.
(56)
A. dividing
B. ranging
C. gathering
D. arranging