Despite ______ efforts the firemen were unable to save the house.A.vacuousB.vanillaC.vali

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Despite ______ efforts, the firemen were unable to save the house.

A.vacuous

B.vanilla

C.valiant

D.vagrant

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_________。