It’s time that you_____with the relief work in the flood-stricken area after the awful typhoon.
A．must helpB．can helpC．helpedD．have helped
C

試題分析：考查虛擬語(yǔ)氣：句意：在可怕的臺(tái)風(fēng)后，你們是時(shí)候幫助洪水泛濫地區(qū)的救援工作了。這里用了句型“It’s time that+從句”正是…的時(shí)候了，從句中的謂語(yǔ)用should do或是一般過去式，表示虛擬語(yǔ)氣，選C。
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