问题
选择题
_____ at the theatre，he found the ticket his friend gave him was left at home.[ ]
A. To arrive
B. On arriving
C. While arrived
D. On arrived
答案
答案：B
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_____ at the theatre，he found the ticket his friend gave him was left at home.[ ]
A. To arrive
B. On arriving
C. While arrived
D. On arrived
答案：B