Weoftensaythatintelligence(智力)meansbeingabletosolveproblems.Sometimesanimalsseemabletodothis.1,dogsandcatsoftenfindtheirwayhomefromlongdistance.Todothis,theyhavetousetheirintelligence.Theyhavetore

Question

　　We often say that intelligence (智力) means being able to solve problems. Sometimes animals seem able to do this. 1 , dogs and cats often find their way home from long distance. To do this, they have to use their intelligence. They have to remember and think. But many birds find their way over long distances, too. They 2 thousands of miles every year when they move from cold to warm countries. We do not know how they do this, but we know they do not use their intelligence. They do not remember places and directions and then make decisions. 3 birds are able to make these journeys without help as soon as they can fly. They are born with this ability. This is not intelligence. We call this“instinct”(本能).
　　Often we can not be sure whether an animal is 4 intelligently. When a dog hears a strange noise, it barks. This is instinct. It can not stop itself from doing this. It does not 5 know why it is doing this. But suppose a house is on fire and the dog barks outside its master's bedroom until he wakes up. Is the dog using its intelligence? Is it solving the problem by waking its master or is it simply barking instinctively because it is afraid? Often we can not be sure.
　　Many animals, however, can be taught to solve problems, especially when they are given 6 . Rats have been taught to touch a key to get food. Animals in circuses have been taught to do all sorts of tricks to amuse the audience. In all these cases, we may say that an animal is using intelligence. This may be thought of as a 7 kind of intelligence.

• A

  In fact
• B

  For example
• C

  On the other hand
• D

  At present

• A

  travel
• B

  litter
• C

  escape
• D

  jump

• A

  Early
• B

  Clean
• C

  Young
• D

  Big

• A

  acting
• B

  shouting
• C

  selecting
• D

  disturbing

• A

  mainly
• B

  usually
• C

  suddenly
• D

  really

• A

  examples
• B

  suggestions
• C

  rewards
• D

  seats

• A

  perfect
• B

  low
• C

  different
• D

  strange

Answer 1

【分析】1. 后句dogs and cats often find their way home from long distance.是列举的例子。故选for example“例如”。
\n2. 它们每年要飞几千英里。travel 行进。
\n3. 由后面的as soon as they can fly可知，选young“年幼的”。雏鸟一会飞就能完成这些旅程，不需任何帮助。
\n4. 我们经常不能确定动物是否能进行智能反应。act 反应，行动。
\n5. 它确实不知道为什么这么做。really 真正地，确实。
\n6. 但是，可以训练动物来解决问题，尤其是当给予它们奖赏的时候。reward 奖赏。
\n7. 这也许被认为是一种低层次的智力。low 低的。