题目内容
The doctor said that the treatment would continue until the patient reached the point ________ he could walk correctly and safely.
A.where
B.when
C.which
D.that
答案:B解析:point 为先行词,后面为定语从句,在定语从句中walk 为不及物动词,从句不缺少宾语,缺时间状语故用when 引导。句意:医生说,病人的治疗要持续到他能够安全稳当地行走时为止。
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