题目内容
【题目】Not only Dave but also his brother ______ the army for two years.
A. has become a member of B. have joined
C. have been a member of D. has been in
【答案】D
【解析】
句意：不仅戴维而且他的弟弟参军两年了。根据not only---but also---不仅---而且--- 连接句子的两个主语时。谓语动词用就近原则，所以排除B/C；根据for two years.可知用延续性动词，become成为，短暂性动词，be in 参加，延续性动词；故选D
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