GWD的一道题，求助。。

Jeffrey-N

At an orientation meeting, the travelerswere told that a visa, a landing card, and evidence of inoculation againsttyphoid 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

答案为什么是D呢？我看不出ADE的区别哎，求助

viviansecret

A用了被动语态，这个不如主动好。
B和C的of being inoculated不如inoculation简洁，A of B的结构放两个名词更顺畅。
E把for each of them放在句尾不好，离修饰对象they太远了，容易有歧义。
D的they would each，each做同位语，这是优选结构.

Jeffrey-N

明白了 谢谢！

xunjiejie88

其实不是这个意思。 by each of them 是指 这三个东西每个都要  for each of them 是指每个人 但是E中 这个结构不好  D 也是说 每个人 they would each each 为人的 同位语