I called you up,but you were not in .---Sorry I ( )in the reading room A was in,B had been in选哪个

I called you up,but you were not in .---Sorry I ( )in the reading room A was in,B had been in选哪个

题目

I called you up,but you were not in .---Sorry I ( )in the reading room A was in,B had been in选哪个

答案

B

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