问题
选择题
________ my arrival in Sydney, I'll write a letter to you telling you everything about the plan. [ ]
A. On
B. By
C. In
D. At
答案
答案：A
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________ my arrival in Sydney, I'll write a letter to you telling you everything about the plan. [ ]
A. On
B. By
C. In
D. At
答案：A