单选题 They will go to Hawaii for winter vocation as soon as they ______ their exams.
A. will finish B. are finishing C. finish D. have finished

【正确答案】 C
【答案解析】[解析] 本题考查的是时态。在时间状语从句和条件状语从句中，用一般现在时表示将来的动作。故选C。