As you know he was slow______his students although he was quick to criticize.A.praisingB

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As you know, he was slow______his students, although he was quick to criticize.

A.praising

B.to praising

C.praised

D.to praise

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。