Everyone should______before he / she stays at a hotel in the United States.A.check upB.che

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Everyone should______before he / she stays at a hotel in the United States.

A.check up

B.check in

C.check off

D.check out

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_________。