He had his camera ready ____he saw something that would make a good picture．  
A．even ifB．if onlyC．in case D．so that
C
連詞辨析。A即使；B只要；C以防；D以至于。結(jié)合句意可知C正確。句意：他把相機準備好了以防看見一些能拍出很好的照片的東西。
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