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

These children are quick ________ learning, 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-土木工程-大学英语III

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