2. 外语
  3. Although April did not bring us the【S1】______we all hoped for, and although the Central Valley doesn’t generally experience the

Although April did not bring us the【S1】______we all hoped for, and although the Central Valley doesn’t generally experience the

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问题     Although April did not bring us the【S1】______we all hoped for, and although the Central Valley doesn’t generally experience the atmospheric sound and lightning that can【S2】______those rains, it’s still important for parents to be able to answer the【S3】______questions about thunder and lightning.
    The reason these two wonders of nature are so difficult for many adults to【S4】______to children is that they are not very well understood by adults themselves. For example, did you know that the lightning we see【S5】______clown to the earth from a cloud is【S6】______flashing up to a cloud from the earth? Our eyes trick us into thinking we see a downward motion when it’ s actually the other way around. But then, if we believed only what we think we see, we’ d still【S7】______that the sun rises in the morning and sets at night.
    Most lightning flashes take place【S8】______a cloud, and only a relative few can be seen jumping between two clouds or between earth and a cloud. But, with about 2,000 thunder storms taking place above the earth every minute of the day and night, there’ s enough activity to【S9】______about 100 lightning strikes on earth every second.
    Parents can use thunder and lightning to help their children learn more about the world around them. When children understand that the light of the lightning flashing reaches their eyes almost at the【S10】______moment, but the sound of the thunder takes about 5 seconds to travel just one mile, they can begin to time the interval between the flash and the crash to learn how close they were to the actual spark.
                                         Word Bank

A)explain
B)actually                                               I)accompany
C)thunder                                                J)depend
D)same                                                   K)reins
E)flashing                                               L)probably
F)produce                                                M)insist
G)different                                              N)adults
H)inside                                                 O)youthful
【S9】
选项
答案F
解析 此处应填一个动词原形，因为“there is activity to do”，又根据前面的“雷暴take place(产生)”与之对立，此处是“闪电产生”，故用produce。
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大学英语四级

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