Smoking, ____ some smokers, might ease their anxiety sometimes, but ____ the addiction caused by their constant practice, it is really hard to give up.
A.according to; due to
B.according to ;because
C.as to; since
D.thanks to;if
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A解析该题介词短语意义辨析。首先应从句子结构入手，找出句子的主要成分：Smoking might ease their anxiety but it is really hard to give up。其中的两个介词短语分别充当状语。因为句子中的addiction是被过去分词短语修饰的名词，因此它前面不能用连词，只能用介词；而且后的but分句表示转折，因此只能选择due to。本句的意思是：一些吸烟者认为，吸烟可能有时会缓解其紧张的情绪，但是，由于这种连续不断的行为所形成的烟瘾是很难戒掉的。【标签】介词短语意义辨析