I’ve been working all day, but I feel as if I _______ nothing.
A．have been achievedB．were achievingC．had achievedD．a(chǎn)m achieving
C
考查虛擬語(yǔ)氣，此題是與過(guò)去相反的虛擬語(yǔ)氣，as if 后應(yīng)用過(guò)去完成時(shí)態(tài)，句意：我整天一直在工作，但是我感覺(jué)好像什么也沒(méi)完成。所以選C。
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