下述哪一种疾病出现终末血尿（）。

A.急性肾炎

B.肾肿瘤

C.后 * * 损伤

D.肾结石

E.输尿管结石

---We’ve seen many more days of blue skies recently.

　 ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky”　　　　　program, the city only ________ about 100 days a year.　　

A．which, sees

B．that, saw

C．when, saw

D．and, seeing