Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars (毛虫) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell---a signal causing its neighbors to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn’t trees have ways of sending message?
(1).It can be concluded from the passage that caterpillars do not feed on leaves that ______.
A.are lying on the ground
B.have an unpleasant taste
C.bees don’t like
D.have an unfamiliar shape
(2).The willow tree described in the passage protected itself by ______.
A.growing more branches
B.communicating with birds and bees
C.changing its leaf chemistry
D.shaking caterpillars off
(3).According to the passage, the willow tree was able to communicate with other trees by ______.
A.waving its branches
B.giving off a special smell
C.dropping its leaves
D.changing the colour of its trunk
(4).According to this passage, bees communicate by ______.
A.making special movement
B.touching one another
C.smelling one another
D.making unusual sound
(5).The author believes that the incident described in the passage ______.
A.cannot be taken seriously
B.should no longer be permitted
C.must be checked more thoroughly
D.seems completely reasonable
三、完型填空 (共 1 道试题,共 15 分)
40.Do you find getting up in the morning so difficult that it’s painful? This ## called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy ## .
During the hours when you ## your work you may say that you’re ‘hot’. That’s true. The time of day when you feel most ## is when your cycle of body temperature is ## its peak. For some people the peak comes during the forenoon. For ## it comes in the afternoon or evening. No one has discovered why this is so, but it ## such familiar monologues (自言自语) as: Get up John! You’ll be late for work again! The possible explanation to the trouble is that John is at his ## and energy peak in the evening, ## family quarrelling ends when husbands and wives realize ## these energy cycles mean, and which cycle each member of the ## has.
You can’t change your energy cycle, but you can learn to make your life ## it better. ## can help, Dr. Kieitman believes. Maybe you’re sleepy in the evening but feel you must ## late anyway. Counteract (对换) your cycle ## by habitually staying up late than you want to.
(1).
A.might be
B.must be
C.need be
D.can be
(2).
A.circle
B.recycle
C.cycle
D.crisis
(3).
A.go through
B.see through
C.break through
D.labor through
(4).
A.energetic
B.active
C.strenuous
D.idle
(5).
A.on
B.at
C.over
D.in
(6).
A.other
B.another
C.one another
D.others
(7).
A.owes to
B.leads to
C.leads into
D.attributes to
(8).
A.temper
B.thought
C.temperature
D.mood
(9).
A.Much
B.Many
C.Such
D.More
(10).
A.how
B.that
C.which
D.what
(11).
A.house
B.family
C.home
D.room
(12).
A.fit
B.adopt
C.like
D.look
(13).
A.Hobby
B.Characteristic
C.Interest
D.Habit
(14).
A.stay away
B.stay out
C.stay at
D.stay up
(15).
A.to extent
B.to some extent
C.to the extent
D.to an extent
四、其他题 (共 5 道试题,共 35 分)
41.（英译汉）Although no longer slaves after the Civil War, American blacks took no significant part in the life of white America except as servants and labours.
42.（根据阅读理解Passage2回答问题）What do you think is the life of astronauts like?
43.（根据阅读理解Passage1回答问题）How do birds communicate with each other?
44.Instructions: Mobile phones and the Internet play an important part in the way in which people relate to one another socially. Is this a positive or negative development?
You should write at least 150 words .
手机和互联网在人们的社会关系里扮演着重要的角色。这种发展是积极的还是消极的？用英语写出一篇不少于150字的短文。题目自拟。
45.（汉译英）年复一年，女人在女儿、妻子、母亲中熬白了头发，可是回首往事时，依然是那句朴素的“我愿意”。
兰大《大学英语（3）》2021平时作业3[答案]作业标准满分答案
