By the end of last year another new gymnasium in Beijing.A. would be completedB. was bei

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。