The building——by the end of next year will contain the lab.A.being completed B.has been completed C.to be completed D.to have completed

问题描述:

The building——by the end of next year will contain the lab.
A.being completed B.has been completed C.to be completed D.to have completed

C.

C.to be completed 是对的.
句子是一般将来时,说明complete的动作还没发生,用to be completed.