Question

By the time you come back, your aunt ______ for Nanjing to attend a meeting.

A. will leave
B. leaves
C. left
D. will have left

Answer 1

答案D
考查时态，by+时间状语，句子通常用完成时态，根据从句By the time you come back,可知指将来，所以用将来完成时。选D。