问题补充:
By the time you get to the airport, I for you at the gate.
A. will have waited
B. will have been waiting
C. will be waiting
D. am waiting
答案:
A. will have waited
B. will have been waiting
C. will be waiting
D. am waiting
解析:句意:到你到机场的时侯我会正在等你。By the time是连词短语,连接时间状语从句,因为时间状语从句是一般现在时,主句是将来范畴的时态,因为bythetime引导的状语从句,主句中往往使用完成时,但是如果遇见不带时间状语的表示状态的动词时,使用一般时,选C。