楼上分析错误。选A
本题考查虚拟语气。It is time that后接从句，从句谓语通常用过去式表示现在或将来。
高考同样例题
—Peter, your hair is getting much too long. It’s high time you __________it cut.
—OK. I will.
A. have B. had C. have had D. will have
答案B
虚拟语气用于定语从句中。
这种从句常用于句型“It is (high)time (that) … ”中，定语从句的谓语动词用一般过去时(be用were)或 should + 动词原形，意思是“(现在)该……”。如：
It’s time that I picked up my daughter. It’s high time we were going.