Question

You’re here because either you or someone you know ___ been diagnosed as type II diabetic？

You’re here because either you or someone you know ___ been diagnosed as type II diabetic.
A. are B. had
C.has D. have
应该是来之前就被诊断了，应该是过去完成时啊？

Answer 1

过去完成时一定要在过去之前发生的动作，也就是说，一定要有一个过去的时间作为参照。本句话没有出现过去时，只有you're here（一般现在时），所以答案应该填has。

如还有不清楚

的，欢迎追问。

Answer 2

填写has.
You’re here because either you or someone you know has been diagnosed as type II diabetic？
因为主语部分是一般现在时，从句不能用过去时或者过去完成时。