To keep healthy, he tries his best to ________ cigarettes.A.stay away fromB.stay awayC.staying away fromD.staying away
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A解析解析：本题考查stay away from sb /sth的用法。try one's best to do sth意为“尽某人最大努力去做某事”，to为不定式符号，后接动词原形，故排除C、D项。away为副词，后面不可接名词做宾语，B项缺少介词from。故正确