—Ken, why do you look so tired? 
—I _______ myself to the climate since I came here.
A．didn’t adaptB．haven’t adaptedC．don’t adaptD．hadn’t adapted
B

試題分析：考查時態(tài)。句意：—Ken，你怎么看上去如此的疲憊？—自從我來到這里以來，我就沒有能夠適應(yīng)這里的氣候。句意指從過來來這里，到現(xiàn)在為止我一直都未能適應(yīng)這里的氣候。故使用現(xiàn)在完成時，故B正確。
點評：現(xiàn)在完成時，通常都有一些特殊的時間狀語，如since, in the past/last…等；
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