The United States______a population of over 200 millions.A.have hadB.is havingC.haveD.has

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The United States______a population of over 200 millions.

A.have had

B.is having

C.have

D.has

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_________。