问题
_________ my task, I went on _________ him because we had planned to practise ______ the drums together later.
A:Finishing helping to play
B:Having finished to help playing
C:To have finished to help playing
D:Finished helping to play
B:Having finished to help playing
C:To have finished to help playing
D:Finished helping to play
正确答案是：
同类题型
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