We’d better __________ when he is thinking, as he prefers to solve problems on his own．
A.wake him upB.keep him awayC.leave him aloneD.call him up在线课程C
由后半句说“他喜欢独自解决问题”可知前半句是说“当他思考问题的时候不要去打扰他”。leave sb．alone意为“不打扰某人；让某人独自呆着”。而A项意为“把某人叫醒”；B项常用作keep sb．away from…，意为“使某人远离……”；D项意为“给某人打电话”。