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单选题
People have found that walking is one of the best ways for a person to _____ healthy.
A

maintain

B

reserve

C

preserve

D

stay


参考答案

参考解析
解析:
句意:人们发现步行是让一个人保持健康的最好方法之一。stay保持,停留。maintain维持,保持。reserve保存,保留,储存。preserve保护,防护,维护。四选项中,A,B,C均为及物动词,后面不能跟形容词,而D可以做系动词,后面跟形容词,构成系表结构。
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