The pencil is Danny's mouth.[ ]
A. in
B. are
C. where
答案：A
-----What has made him upset recently?
-----_______ alone to face a troublesome milk case.
A．Left
B．Being left
C．Having left
D．To leave
肺部急性炎症的主要病理变化为（）
A.渗出
B.增生
C.空洞
D.纤维化
E.钙化
