Requests for paternity tests (亲子鉴定) by Chinese men ______ (increase) in recent years.

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问题 Requests for paternity tests (亲子鉴定) by Chinese men ______ (increase) in recent years.

选项

答案have increased

解析 动词时态。根据时间状语in recent years(通常用于完成时态),此处需用现在完成时。
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