建筑物外公共区域的清洁不包括：（）
A.道路清洁
B.公共绿地清洁
C.墙面清洁
D.水池景观清洁
参考答案：C
It was dark when Mary went out. I wonder how she ______ through the black lane by herself.
A．dared not to go
B．dare going
C．not dare go
D．dared to go
良性胃溃疡最好发于（）
A.胃小弯近角切迹处
B.胃窦
C.胃底
D.十二指肠壶腹部
E.十二指肠降部
