— Hi, Tom．Any idea where Mary is? ．
一 She　______in the reading room．I saw her there just now．
A．shall beB．should have been
C．should beD．might have been
C

這題考查情態(tài)動詞的用法：這是對現(xiàn)在情況的猜測，所以排除B和D，這里是根據(jù)I saw her there just now．推理出她應(yīng)該在閱覽室。Should表示按道理應(yīng)該，選C。
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