Question

These kids are quick at learning. We had better have them __ in a new way.

A．having been trained

B．training

C．being trained

D．trained

Answer 1

D

考察非谓语动词。句意：这些孩子们学的很快。我们最好用一种新的方法训练他们。使役动词后接过去分词表示把某事做了。故选D。