问题
选择题
_____ at the gate of the theatre, he found the ticket for the play was left at home.[ ]
A. To arrive
B. On arriving
C. As arriving
D. While arriving
答案
答案：B
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_____ at the gate of the theatre, he found the ticket for the play was left at home.[ ]
A. To arrive
B. On arriving
C. As arriving
D. While arriving
答案：B