D.the fact that the gray squirrels have a bad memory
答案:B 细节理解题,根据第三段“Gray squirrels and red squirrels do not store nuts and seeds in the same way.”可知。
3.When Professor Swihart says “death traps for seeds”, he actually means that
.
A.nuts above the ground will not develop into plants
B.red squirrels eat more nuts than gray squirrels
C.gray squirrels and red squirrels will have severe fights
D.seeds can be traps for other animals in the forest
答案:A 句意猜测题。根据第三段倒数第二句“Red squirrels, however, store large groups of nuts above ground.”可知答案。
4.According to the passage, which of the following is TRUE?
A.Gray squirrels do more harm to the forest than red squirrels.
B.Red squirrels and gray squirrels have helped the spread of walnut trees.
C.The cleaning of forest land benefits gray squirrels directly.
D.Human beings should bear some responsibility for the decreasing number of gray squirrels.
答案:D 细节理解题。利用排除法,根据第四段“...as more forests were cut for agriculture.”可知D项正确,A项未比较过;B项应是Gray squirrels有助于walnut tree的传播;C项“directly”描述错误。
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