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A good teacher has to be able to think . [ ] A.on foot B.by foot C.by his feet D

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A good teacher has to be able to think . [ ] A.on foot B.by foot C.by his feet D

A good teacher has to be able to think ________.

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A.on foot

B.by foot

C.by his feet

D.on his feet

试题答案

答案:D

提示:

on one's feet独自地