the coming years ,the year to come 的区别.

the coming years ,the year to come 的区别.
the key to doing the work is to figure out the possible effect of water pollution on the villagers in the years ______.
A.coming
B.to come.
我知道选B,但是A为什么错,是不是因为不能后置,另外,如果是the coming years ,和 the year to come