It was Mr. Zhang that helped us out of the trouble. Without his help, we ______ it so easily.
A．can’t manage
B．mustn’t have managed
C．couldn’t have managed
D．couldn’t manage
C

試題分析：考查虛擬語氣。虛擬語氣分為if引導的虛擬條件句，含蓄條件句和混合虛擬語氣。without沒有，后跟含蓄條件句，相當于if it was not for...。根據(jù)helped可知，是發(fā)生過的事情，對過去虛擬，主句用would/could/should have done。故選C。
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