问题补充:
By the end of last year another new gymnasium in Beijing
A. would be completed
B. was being completed
C. has been completed
D. had been completed
答案:
A. would be completed
B. was being completed
C. has been completed
(答案→)D. had been completed
解析:本题考查时态。by the end of 后接表示过去的时间在句中作时间状语时,句子谓语动词使用过去完成时。