______ almost all our time to our schoolwork in the past three months, we have almost no time for fun and play．

       A．Having devoted      B．Devoted   C．To devote        D．To have been devoted

A


解析:

考查非謂語動詞。devote表示“投身于，致力于”，用devote oneself/one’s time to或be devoted to，本空接了賓語，有延續(xù)性時間狀語，因此用現(xiàn)在分詞完成式做狀語。

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