The iron and steel industry ______ an important part in our national economy.A.playsB.play

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The iron and steel industry ______ an important part in our national economy.

A.plays

B.played

C.play

D.playing

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_________。