关于基础体温测定的描述错误的是（）

A.无排卵周期呈单相型

B.有排卵周期呈双相型

C.受雌激素影响体温上升0.3℃

D.需连续测3个月以上

E.睡眠不足影响结果

We were all surprised when he made it clear that he ______ office soon.

A．leaves

B．left

C．would leave

D．had left