问题
选择题
_______ all my letters, I had a drink and went out for a walk.[ ]
A. Finished
B. Having finished
C. Finishing
D. To finish
答案
答案：B
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_______ all my letters, I had a drink and went out for a walk.[ ]
A. Finished
B. Having finished
C. Finishing
D. To finish
答案：B