In this experiment, they are woken up several times during the night, and asked to report what they＿＿＿＿.

A．had just been dreaming

B．are just dreaming

C．have just been dreaming

D．had just dreamt

患者男性，67岁。2周前B超查体发现右肾中下极3cm偏强回声占位病变，外向生长，无症状。

可能的诊断有（）

A.肾错构瘤

B.肾盂癌

C.肾癌

D.肾结核

E.肾囊肿

F.肾脂肪瘤