大全 830

zhufei11

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


A 和B 的区别？
原句could 可以用 can 替换 ？
than 后面为什么不加they had ?

请各位帮忙啦 ！谢啦~

gmatziyu

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

这题 第一个can 说明应该用现在时阿。 所以第二个can 而不是could not. 第三个than 是than is anticipated---用被动时

zhufei11

B 中 than 是than is 省略 is 吗？
这个地方我不太懂唉，能再解释下吗 ？
谢谢了

zhangbutan

后面还有一个动词啊，显然不能再有一个is了。than后面只是一个完整句子

zxkingsey

anticipated是个过去分词，表示被动
accidents, weather conditions that cannot be foreseen, and pilot errors 这些事不能被预见的，要用被动，而其他4个选项都无被动之意

zhufei11

懂了，