（1）     T-7-Q31

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.

1. a visa, a landing card, and evidence of inoculation against typhoid fever would be needed by each of them

2. they would need a visa, a landing visa, and evidence of their being inoculated against typhoid fever

3. they would need evidence of being inoculated against typhoid fever and a visa and landing card

4. they would each need a visa, a landing card, and evidence of inoculation against typhoid fever

5. they would need visas, landing cards, and evidence of inoculation against typhoid fever for each of them.

答案选D，可是我记得：复数名词+each  后面谓语动词应该用复数，那么这里 they would each need 后面接的名词，不也应该是复数吗？D中用a visa / a landing card ……对吗？

up

虽然已经排除了其他选项，但是对于D中的a visa等还是心存疑虑

they each中的each应该是同位语，拿掉不看，这就是为什么they each后面加上动词复数形式的原因，因为they each其实就是they，既然如此，那么D答案就是they need a visa...，一大推人要一张visa？？？

跪求NN解释，拜谢！！