John, may I use your computer now?
Sorry, it is not ____at the moment. It is being repaired.
A．convenientB．valuableC．a(chǎn)vailableD．comfortable
C

試題分析:考查形容詞辨析。A方便的；B有價(jià)值的；C可得到的，可利用的；D舒服的。從語(yǔ)境可知說(shuō)話時(shí)電腦不能使用，所以C選項(xiàng)正確。句意：--約翰，我現(xiàn)在可以用你的電腦嗎？--抱歉，現(xiàn)在不能用，正在修著呢。
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