问题
选择题
_____ the police thought he was the most likely one, since they had no exact proof about it,they had to set him free.
A．As long as
B．If only
C．Although
D．As though
答案
C
题目分析：连词辨析。A只要；B要是…就好了；C尽管，即使；D似乎，好像；句意：尽管警察认为他是最有可能的一个，但是因为他们没有确切的证据，他们不得不把他释放了。故C正确。
点评：连词的词义辨析要放在上下文的语境中进行，要注意上下文的语义的串联以及逻辑关系的推理，特别要注意一些连词和时间状语的固定搭配。