2. 外语
  3. Animals do not eat more than their bodies need. They seem to have the (1)______ to eat when they are hungry. It has been demonst

Animals do not eat more than their bodies need. They seem to have the (1)______ to eat when they are hungry. It has been demonst

admin2013-10-11  4
问题     Animals do not eat more than their bodies need. They seem to have the (1)______ to eat when they are hungry. It has been demonstrated that rats will,(2)______given a choice over a period of time,(3)______ water with vitamins to water without vitamins(4)______there is no difference in taste or smell between the two water bottles. When a(5)______ flavor was added to the vitamin-enriched (6)______, the rats did seem to (7)______ a taste for it and kept drinking it, even after the vitamins were (8)______to the clear water.(9)______, however, they broke the habit and went back to(10)______ the necessary vitamins were.
    In a classic experiment, babies of 6 to 12 months old were(11) ______ in a cafeteria feeding arrangement,(12)______a wide selection of baby food before them. They were given whatever food they pointed to or appeared(13)______in. We are told that at first they showed some unusual eating (14)______, but that over a period of time they managed to select well-balanced(15)______.
    So, in selecting food, rats and babies do seem to know and act(16)______ what’s best for them. Apparently, humans soon(17)______a kind of " body wisdom" when growing up.(18)______of us do not eat as wisely as we could. Many of our food preferences are(19)______determined and influenced by long-established habits. Some people eat fox, dog and blackbirds,(20)______we eat cows and pigs. So what people eat and how much they eat seems to be greatly influenced by what is going on around them.
(2)
选项 A、because
B、when
C、if only
D、whereas
答案B
解析 连词辨析题。[B]when引出过去分词短语作状语，表示“在……的情况下”，符合句意，故为正确答案。由于句子各部分间不是因：果关系，所以可以排除[A]because；[C]if only与虚拟语气连用，表示“要是……多好”，而此处不是虚拟语气，可以排除；[D]whereas的意思是“然而”，表示转折，不符合上下文逻辑关系，故排除。
转载请注明原文地址:https://kaotiyun.com/show/NeLK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)