问题补充:
These students are quick at learning. Well have them with new methods.
A. training
B. to train
C. to be trained
D. trained
答案:
A. training
B. to train
C. to be trained
(答案→)D. trained
解析:本题是对动词使用的考查。have在英语中是一个极其重要的词,它的用法有很多。此题中have sb.trained表示“给他们用新方法训练”。