John______away for the last two days but he should be back tomorrow.A.isB.wentC.has beenD.

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John______away for the last two days but he should be back tomorrow.

A.is

B.went

C.has been

D.has gone

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_________。