语法与词汇 9.______that my head had cleared, my brain was also beginning to work much better.
【正确答案】 B
【答案解析】句意为：我的头脑已然清醒了，我的大脑又开始工作得更好了。now that是“既然、已然”的意思，相当于since，符合句意，故选B项。