He ______ told you that because you have known the truth.      
A．needs not have B．need not have C．need not has D．does not need have
B
考查情態(tài)動詞表示虛擬語氣的用法：needn’t have done“本不必做而做了”，句意是：因為你已經(jīng)知道事實了，他本沒有必要告訴你的。選B
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