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