These children are quick ________ learning, and we’ll have them trained in new methods.<br>A、 from<br>B、 for<br>C、 at<br>D、 on

These children are quick ________ learning, and we’ll have them trained in new methods.
A、 from
B、 for
C、 at
D、 on

出自：石家庄铁道大学大学英语II

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