90-08-3

karen125

A biologist does not merely describe organisms, but tries to learn ---act as they do.

(A) what cause them to

(B) causes them to what

(C) what to cause them

(D) what does to them

A

请问A为什么是cause而不是causes?是不是题目打错了？谢谢!

落九天

以下是引用karen125在2005-3-12 11:18:00的发言：

A biologist does not merely describe organisms, but tries to learn ---act as they do.

(A) what cause them to

(B) causes them to what

(C) what to cause them

(D) what does to them

A

请问A为什么是cause而不是causes?是不是题目打错了？谢谢!

没有错，导致他们行为的因素有很多，不一定是就一个。所以cause没有错。

olin

没有what causeS them to这个选项

TOEFL语法是选出唯一正确的选项