问题补充：
As we all know, planting trees is good for the environment. Our class will go to the Sun Island tomorrow. As soon as we there, we’ll begin to plant trees.
A. arrived B. arrive C. will arrive
答案：
解析：考查状语从句的时态。在as soon as引导的时间状语从句中，如果主句和从句的动作都发生在将来，从句用一般现在时表示将来，句意：我们一到那儿，我们就开始植树。故选B.
