问题
选择题
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
答案
答案：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。
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