单选题
{{I}} Questions 18 ～21 are based on the monologue about taking care of dogs.{{/I}}
单选题
How long should food be left before a dog?
【正确答案】
D
【答案解析】[听力原文]18-21
When you have a dog it is necessary to care for it carefully. In return you will be loved by your dog.
The most important part of dog-care is to keep the dog clean. Not only does the dog have to be kept clean, his environment should also be clean. The bed he sleeps in can be made with anything like a rug or a dog mattress.
Proper feeding is also important. A dog should be fed in the same place and on a regular schedule. During feeding time it should be quiet, ff your dog refuses to eat, don't force him. Remove his food and don't feed him again until his next feeding.
Food should never be left before a dog for over thirty minutes under any circumstances, If he does not eat over a long period of time, your dog should be taken to a vet. Another important thing is to keep fresh water available to the dog during hot weather.
One important thing is exercise for dogs. Vigorous exercise helps to build strength and keeps dogs healthy. A regular walk at a fixed time of the day is enough for smaller dogs. Large dogs, though, require a run in an open field.
[解析] 本题考查细节辨认。这道题的答案在文中直接给出，喂食是文章所论述的三个方面之一，文章不仅提到按时喂食，另外还提到：Food should never be left before a dog for more than thirty minutes under any circumstances．“无论在何种情况下，都不得将食物在狗面前放置超过三十分钟。”
单选题
What kind of dogs needs to run for exercise?
【正确答案】
B
【答案解析】[解析] 本题考查细节辨认。和第18题一样，这题也能在文中直接找到答案。文中最后讲狗的锻炼问题。尽管这很重要，但很多养狗人忽略了这一点。适当的锻炼能够使狗健康而有力。对于小狗，每天常规的散步足以；而对大狗，则需要在空旷的地方奔跑锻炼。Large dogs，though， require a run in an open field．
单选题
Which point was not mentioned as important for good care of a dog?
【正确答案】
D
【答案解析】[解析] 本题考查综合归纳。文章主要论述如何养狗。大致可以分为四部分；第一部分为总起，简要说明下面所要论述的内容，第二、三、四部分分别从卫生的生活环境、正确的喂食和适当的锻炼来分述如何养狗。这里并没有提到经常带狗去看兽医，只是在有必要时才去。如狗不吃食：If he doesn't eat over a long period of time，your dog should be taken to a vet．