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:考查时态。本题的解题关键是by到…时为止,该词要和完成时连用,本句by后面有last year,故使用过去完成时的时态。句意:到去年年底为止,另外一座新的体育馆已经被建成了。故D正确。