---- John ,why are you so upset?
----I _________ my cellphone all morning but it is nowhere to be found.
A．a(chǎn)m looking for B．have looked for
C．have been looking forD．had looked for
C

試題分析:考查動詞時態(tài)。句意：--約翰，為什么這么沮喪呢？---我找了一上午手機，可是在哪里也沒找到。從句中的all morning 整個上午判斷動作應(yīng)該是一直持續(xù)的，所以排除B,D選項，然后從語境判斷說話時候沒在找手機，所以應(yīng)該用現(xiàn)在完成進行時表示一直在找，故C為正確選項。
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