题目

May I have a rest? I have already finished ______ the report. A. write          B. writing       C. to write        D. written 答案：答案: B 【解析】考查固定搭配。finish后接动名词doing，故选B项。下列变化属于化学变化的是（    ） A．海水晒盐        B．空气液化        C．煤的干馏       D．石油的分馏