1（2010·江苏省南通市二模）23. Knowing office rules — whether _______ or not—is critical, especially for young job seekers.
A. written B. writing
C. being written D. having been written
A
2（2010·黑龙江省哈三中等四校二模）31． his membership card，Tony decided to make a phone call to check whether there was something wrong．
A．Having not received B．Not receiving
C．Not received D．Not having received
D
