A-A+
Results of a recent study appear to explain th
问题详情
Results of a recent study appear to explain the long-standing question of why many women develop lung cancer, ______ they themselves are non-smokers.
A．if
B．unless
C．but
D．although
参考答案
正确答案：D
解析：句意：一份最近的研究结果好像解释了长期以来的一个问题，即为什么许多女人会得肺癌尽管她们自己并不吸烟。本题考查连词辨析。if：如果；unless：除非；but：但是；although：尽管。此处although引导一个让步状语从句。
