挺简单的，但容易错啊！ 请帮我分析一下！

斯巴达

T-9-Q41. 987-830
The spraying of pesticides can be carefully planned, but accidents, weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had anticipated.
A.    weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had
B.    weather conditions that cannot be foreseen, and pilot errors often cause much larger deposits of spray than
C.    unforeseeable weather conditions, and pilot errors are the cause of much larger deposits of spray than they had
D.    weather conditions that are not foreseeable, and pilot errors often cause much larger deposits of spray than
E.    unforeseeable weather conditions, and pilot errors often cause much larger deposits of spray than they had

ruimiss

选B？

我是这样解题的。
首先，but前后要对称。前面说的是The spraying of pesticides can be carefully planned，用的词是can be ，那么but是转折，后面的情况应该相应的就是can not了。另外，最后面的 than anticipated之所以不加they had，是因为they没有指代。本来应该是人事先预测，但是前面没有相应的可指代的人出现，所以干脆不加。

斯巴达

对的！是B