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Man has become master of the Earth’s surface. He is constantly probing into the earth’s depths and into atmosphere’s upper reach
Man has become master of the Earth’s surface. He is constantly probing into the earth’s depths and into atmosphere’s upper reach
admin
2014-09-24
29
问题
Man has become master of the Earth’s surface. He is constantly probing into the earth’s depths and into atmosphere’s upper reaches.【C1】______ it is doubtful whether man, with all of his intelligence and vigor, holds his planetary seat with greater【C2】______ than a vast tribe of small, many-legged animals that pass their lives at his feet—the spiders.
Spiders are among the【C3】______ of science. They dwell at higher altitudes than any other【C4】______ of their size or larger. On the slopes of Mount Everest, at an altitude of twenty-two thousand feet—five thousand feet above the vegetation line—【C5】______ a species of black spider only a quarter of an inch long. This is an【C6】______ environment for creatures so delicately constructed. To protect themselves from the chill of night, they take shelter in crevices where the twenty-four-hour【C7】______ in temperature is only twelve degrees, as against forty-four on the outside.
Spiders live in other unlikely【C8】______ —rabbit burrows, flowers, anthills, and the desolate, drafty aeries of eagles. They have been found soaring through the air five miles【C9】______ the earth. One【C10】______ has been discovered in an African cavern more than two thousand feet underground.
【C5】
选项
A、live
B、lived
C、living
D、lives
答案
D
解析
本题要求填入谓语动词的适当形式。本句是个倒装句,主语为a species of blackspider。species(种,类)一词单复数同形,但在本句中是单数,因此谓语动词也应该用单数形式,D项lives为正确答案。整段文章的时态都是一般现在时,故本句中不可能出现一般过去时,因此B项不正确。
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