患者男，58岁，发现间断无痛性肉眼血尿2个月，并伴有排尿困难、尿急、尿频等膀胱刺激症状。

为明确病变的定位及定性，进一步的检查是（）

A.超声检查

B.X线平片

C.膀胱造影

D.CT平扫、增强及三维重组

E.MR检查

____ we rode our bikes for one and a half hours, we ____ the bookstore. [ ]

A. When; reached

B. While; arrived in

C. After; arrived at

D. As soon as; reached