题目内容

        his homework, my son went downstairs to play basketball. 
A．Having finishedB．finishedC．to finishD．finishing
A
考查非谓语动词作状语。my son与finish之间是主动关系，且分词的动作发生在谓语动词之前，故用现在分词的完成式，所以选A，句意：我的儿子完成作业之后他就去楼下打篮球。
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