11页10.How is my mother ,doctor she is fine ,she went to bed at ten last night and now she ----for ei

11页10.How is my mother ,doctor she is fine ,she went to bed at ten last night and now she ----for ei

题目
11页10.How is my mother ,doctor she is fine ,she went to bed at ten last night and now she ----for eight hours
A.had slept B.has slept C.had been asleep 理由
答案
B
显然,截止到现在为止,所以是现在完成时.
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