题目信息
At an orientation meeting, the travelers were told that a visa, a landing card, and evidence of inoculation against typhoid fever would be needed by each of them.
A:a visa, a landing card, and evidence of inoculation against typhoid fever would be needed by each of them
B:they would need a visa, a landing card, and evidence of their being inoculated against typhoid fever
C:they would need evidence of being inoculated against typhoid fever and a visa and landing card
D:they would each need a visa, a landing card, and evidence of inoculation against typhoid fever
E:they would need visas, landing cards, and evidence of inoculation against typhoid fever for each of them
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已选答案：
正确答案：
D:they would each need a visa, a landing card, and evidence of inoculation against typhoid fever
B错在于，they是每个人都需要一个visa，一个LC，一个证据。所以B感觉travelers总体只需要这三个东西。
C错是因为，三样东西，应该是A，B and C.
E错是因为，visa用复数，LC用复数，evidence确只用单数。要么都复数，要么都单数。
A和D其实没问题，只能说这道题里面主动比被动说得更加清楚。选D
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