It’s time that you with the relief work in the flood-stricken area after the awful typhoon.
A. must help
B. can help
C. helped
D. have helped
网友回答
A. must help
B. can help
(答案→)C. helped
D. have helped
解析：考查虚拟语气：句意：在可怕的台风后，你们是时候帮助洪水泛滥地区的救援工作了。这里用了句型“It’s time that+从句”正是…的时候了，从句中的谓语用should do或是一般过去式，表示虚拟语气，选C。