Question

_____ all the exercises, he went out to play basketball on the school playground. A.Doing B.

_____ all the exercises, he went out to play basketball on the school playground.
A.Doing B.Having done C.Had done D.Has done

Answer 1

　　B. Having done

　　动词的现在分词的主动完成式做时间状语，表示“先作文练习题，后出去玩”。