该公文结尾的正确表述方式是( )。
A．报告当否，请批示
B．以上请示当否，请批示
C．请示妥否，请指示
D．以上报告当否，请批示
参考答案：B
______ my pen pals. [ ]
A. This is
B. That is
C. These are
D. Those are
