问题
选择题
By the end of next year，they ________ the work on the new stadium.
A．would have completed
B．had completed
C．will have completed
D．have completed
答案
答案：C
考查时态。根据时间状语“By the end of next year”可知，本句应使用将来完成时态，表示到明年年底前他们将已经完成新体育馆的建设。