口疮若以牙龈为多，其病位主要责之于()
A．脾
B．胃
C．心
D．胆
E．肾
参考答案：B
（）是指借助救助巡逻车和救助亭对街头的流浪人员实施救助。
A.全天候救助
B.专门救助
C.街头救助
D.流浪人员救助
---Do you know how her grandpa passed_____?
--- He died _____ illness.
A．off, from
B．out, from
C．away, for
D．away, of
