沉积盆地

The        look on his face suggested that he         that.    [ ]

A. puzzling ; hasn't expected    

B. puzzled ; hadn't expected    

C. puzzling ; doesn't expect    

D. puzzled ; didn't expect

根据“给定资料”，针对如何解决我国城市地铁建设中存在的突出问题提出建议。
要求：条理清楚，所提建议具体、有针对性。不超过400字。

以濒危野生动物皮革或再生皮革作

慢性胃炎鉴别诊断