气瓶应佩戴（）防震圈。
A.两个
B.三个
C.四个
D.五个
参考答案：A
The weather turned out to be very good, _____ was more than we could expected. [ ]
A. what
B. which
C. that
D. it
北京政府普通法院系统包括（）。
A.大理院
B.高等审判厅
C.地方审判厅
D.初等审判厅
