Dogs wag(搖擺) their tails in different directions depending on whether they are excited and wanting to move forward or threatened and thinking of moving back,a study has found.
Researchers in Italy examined the tail wagging behaviour of 30 dogs,catching their responses to a range of stimuli(刺激物) with video cameras.To conduct the study they chose 15 male dogs and 15 female ones aged between one and six years.The dogs were all family pets whose owners had allowed them to take part in the experiment at Ban University.The dogs were placed in a large wooden box with an opening at the front to allow for them to view various stimuli.They were tested one at a time.
The researchers led by Professor Giorgio Vallortigara of the University of Trieste found that when the dogs were shown their owners—a positive experience—their tails wagged energetically to the right side.When they were shown an unfamiliar human they wagged to the right,but with somewhat less enthusiasm.The appearance of a cat again caused a right-hand side wag,although with less intensity again.The appearance of a large unfamiliar dog,similar to a German shepherd,changed the direction of tail wagging to the left.Reseachers supposed the dog was thinking of moving back.When the dogs were not shown any stimuli they tended to wag their tails to the left,suggesting they preferred company.While the changes in the tail wagging were not easily noticed without the aid of video,it was thought that the findings could help people judge the mood(心情) of dogs.Computer and video systems,for example,could be used by professional dog trainers to determine the mood of dogs that they were required to approach.
小題1:The video cameras were used to catch the dogs’ responses because _______.
A.it was easier to catch the dogs’ response changes in the tail wagging
B.the dogs were put in the wooden boxes and tested one at a time
C.they enabled the dogs’ owners to know about their dogs’ habit
D.the dogs wagged their tails in different directions when they were in different moods
小題2:The underlined word “intensity” in the passage means _______.
A.surpriseB.worry
C.excitementD.interest
小題3:When there are no stimuli,a dog will _______.
A.wag to the leftB.wag to the right
C.not wag at allD.wag to the left and then to the right
小題4:The underlined word “they” refers to _______.
A.the dogsB.the trainers
C.the systemsD.the researchers
小題5:The purpose of doing the experiment is _______.
A.to train dogs for their owners
B.to help people judge the mood of dogs
C.to help dogs find company
D.to help people choose their pet dogs

小題1:A
小題2:C
小題3:A
小題4:B
小題5:B

小題1:這是一道細節(jié)判斷題。根據(jù)最后一段“While the changes in the tail wagging were not easily noticed without the aid of video,it was thought that the findings could help people judge the mood of dogs.”可以推斷出如果沒有攝像機的幫助,人們很難發(fā)現(xiàn)狗尾巴搖動的變化,所以攝像機是使得觀察更加容易。
小題2:這是一道詞義猜測題。第三段是幾個排比的句子,畫線詞和前面的“energetically”和“enthusiasm”都是同義詞。
小題3:這是一道細節(jié)判斷題。根據(jù)第三段“When the dogs were not shown any stimuli they tended to wag their tails to the left...”可知沒有刺激的時候,狗的尾巴是搖向左邊的。
小題4:這是一道指代題。根據(jù)“Computer and video systems,for example,could be used by professional dog trainers to determine the mood of dogs that they were required to approach.”approach 是“接近”的意思,由于是馴狗師被要求接近狗而不能是狗被要求接近馴狗師,所以they指代的是dog trainers。
小題5:這是一道歸納題。根據(jù)最后一段“While the changes in the tail wagging were not easily noticed without the aid of video,it was thought that the findings could help people judge the mood of dogs.”可以推斷出這個研究可以幫助人們判斷狗的情緒。
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閱讀下面短文,掌握其大意,然后從36—55各題所給的四個選項(A、B、C和D)中,選出最佳選項,并在答題卡上將該項涂黑。
I was coaching girls’ track in Iowa and there was a young discus(鐵餅)thrower on the team with  36  potential(潛力). Here goes her story.
At the end of our training   37  the district track meet, this discus thrower, Lucy, asked me if she   38  come to the school on Sunday for a little   39  training. I agreed. The year before, she had placed second at the district meet and   40  missed going to the state meet. She had won every discus event,   41  that district meet! And, her throws in the competitions had   42  been between 106’1” and 110’10”.
Something began to   43  me. Why couldn't Lucy   44  to get the discus to 111 feet? I wondered if it was more a psychological barrier(心理的障礙)  45  a physical one. I decided to try something   46 . I made up my mind to   47  to Lucy.
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The next afternoon, at the district meet, Lucy   53  with a personal best throw of 114’10”! Just 24 hours after I had lied to her. However, this time she had   54  thrown the discus four feet further than she had ever thrown it before.
Sometimes we   55  our own barriers in our mind. So learn to take control of your mind.
21.A. little          B. great           C. no              D. limited
22.A. after           B. during          C. since           D. before
23.A. could           B. must           C. should         D. would
24.A. helpful        B. extra          C. real           D. regular
25.A. luckily         B. completely     C. narrowly        D. probably
26.A. except         B. including      C. despite        D. with
27.A sometimes       B. always         C. never          D. seldom
28.A. frighten       B. please         C. shock          D. bother
29.A. seem           B. pretend        C. need           D. ask
30.A. apart from     B. rather than    C. because of      D. according to
31.A. impossible     B. familiar       C. new             D. easy
32.A. lie            B. turn           C. reply          D. call
33.A. look           B. measure        C. match          D. take
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37.A. excitement     B. anxiety        C. puzzlement     D. anger
38.A. disappeared    B. lost           C. won            D. arrived
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40.A. break          B. remove         C. take           D. set

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小題1: The passage mainly tells us that _______.
A.why it is very hot in Athens?
B.the hot weather is a big problem for Olympic athletes?
C.how important science is to every athlete?
D.the Olympics will be put off because of the hot weather?
小題2:The underlined sentence “other competitors will be pushing their limits during high temperatures”in the fifth paragraph means _______.?
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A.dehydration?
B.being sleepy?
C.that the blood in the body can become less and less?
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