早期肾结核唯一的阳性发现是

A．肾区包块

B．尿中有结核杆菌

C．大量血尿

D．肾盂造影有破坏病灶

E．结核中毒症状

--- Did you enjoy the party last weekend at Peter’s home?

--- Oh, sure. It has been years _______ I last enjoyed myself like that.

A．since

B．before

C．until

D．when