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[单选题]
21.4 Crying was adaptive for our ancestors because____.(2分)
A
it helped them get sufficient nutrition
B
it elicited short episodes of sleep
C
it delayed new pregnancies
D
it helped the infants learn to speak.
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试题答案：
A
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Nowadays, a graduate with a master's degree fail to find a high-paying job, which discourages a lot of college students.(1分)
Laziness is a sin, everyone knows that. We hare probably had all lectures 1.____ that laziness is immoral, that it is wasteful, that lazy people will never amount to 2.____ in life. But laziness can be more harmful than the, it is often caused by more complex reasons than simple wishes to avoid work. Some people who appear to be lazy are 3.____ much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task 4.____ ridicule or fear of having their ideas stolen. These people who seem lazy may be paralyzed by a fear of failure. 5.____, laziness can actually be helpful. Some people may look lazy when they are really thinking, planning, contemplating, researching. We should all remember that some great scientific discoveries occurred 6.____ or while someone was "goofing off(闲荡)". Newton wasn't working in the orchard when the apple hit him he devised the theory of7.____. All of us would like to have someone "lazy" build the car or stove we buy, particularly if that laziness were caused by the worker' s 8.____ to check each step of his work to do his job right. sometimes being lazy--that is, taking time off for a rest--is good for the overworked students or executives. Taking a rest can be particularly 9.____ to the athlete who is trying too hard or the doctor who's simply working himself overtime too many evenings at the clinic. So be careful when you're 10.____ to call someone lazy. That person may be thinking, or planning his or her next book.1. A. handing out B. standing out C. pointing out D. bringing out
2. (A) ice cream (B) food (C)dessert (D) meal
_______ here now, we would have a wonderful time together.(1分)
He is clever, but____, he makes many mistakes.
Not even a word _______ about his past.(1分)
22.5 The use of authentic materials is going to be discussed .(2分)
23.3 Which of the following can possibly best describe the relationship between a cloned human person from whom she/he is cloned?____
23.3 The dog has been most valuable to human beings in the development of ________.(2分)
38. As it is used in the passage, the word "heavily" (Paragraph 5) could best be replaced by which of the following?____
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