I must admit you _____________ but I'm afraid the answer is still no．
A．will tryB．tryC．have tried D．had tried
C

試題分析：考查時(shí)態(tài)。這里用現(xiàn)在完成時(shí)，表示“你已經(jīng)試過了”。句意：我必須承認(rèn)你已經(jīng)試過了，但是恐怕答案依然不正確。故C正確。
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