xdf补充练习33

pyndick

33．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.
（B）weather conditions that cannot be foreseen， and pilot errors often cause much larger deposits of spray than
（D）weather conditions that are not foreseeable，and pilot errors often cause much larger deposits of spray than
could you tell me why B is better than D? thanks

joywzy

1）情态动词，不能没有，意义会不同
2）动词＞形容词

pyndick

但不是主动优于被动
-able应该有can的意思了