求教大全119的一个语法点

119：

Artificial intelligence emerged during the late 1950's as an academic discipline based on the assumption that computers are able to be programmed to think like people.

B were able to be programmed to think as people

D could be programmed to think like people

答案是D。可是，可以用think like people么？不是用as吗？还有B中，除了able to be programmed错了之外，还有哪里是错的呢？

就算前人已经说过，我也说两句。

首先can 比be able to 要好一些， 简洁吗。

而且如果用AS的话，那后面一定要是句子，至少要是as people do .

用LIKE这里是表示象人一样。而不是表示举例。所以LIKE 应该可以。如果LIKE+N。 表示举例的话，是不对的。 应该改为SUCH AS 或者是AS 之类的。

可是can 和be able to不是有本质上的区别么？一个是强调能力，一个是强调能够。

比如说，i am able to speak，but i can not speak in class。

再一个，是不是AS后面一定要有个动词跟着，而LIKE 的后面就不用接。但它们俩前面都可以接动词 ，比如 do like people 或者  do as people do 这样。