问题补充：
He’ll send us a message as soon as he in Sichuan.
A. is arriving
B. will arrive
C. arrived
D. arrives
答案：
A. is arriving
B. will arrive
C. arrived
(答案→)D. arrives
解析：as soon as表示“一…就”引导的是时间状语从句，其用法是主句用将来时，从句用一般现在时，故用arrives。本句的意思是“他一到四川就给我们发信息。”所以本题选C。
