John became a football player ______ the beginning of March.A.onB.withC.forD.at

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John became a football player ______ the beginning of March.

A.on

B.with

C.for

D.at

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_________。