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问题: 高二英语作业求助

P31---4
When___,the museum will be open to the public next year
A. completed
B. completing
C. being completed
D. to be completed



P35---5
___his homework,he went out for a walk
A. Finished
B. To finish
C. Finish
D. Having finished

解答:

1.A. completed 此时是过去分词,表示被动关系,因为the museum 是主语
2.D. Having finished 表示主动关系,因为he是主语
这两个都是非谓语动词形式