downloading of large numbers of apps is one of the most risky behaviors someone with a smartphone can engage in.

A. Cautious B. Public C. Random D. General

 

C

【解析】

試題分析：句意：隨意下載大量的應(yīng)用軟件是擁有智能手機(jī)的人做的最有危險的事情. A. Cautious謹(jǐn)慎的，B. Public公共的，C. Random 隨意的，D. General普通的，所以選C。

考點: 考查形容詞辨析

 

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