The hosts apologized for（ ）that some of their guests might be vegetarians.
A、
having not considered
B、
not having considered
C、
having not been considering
D、
not considering
【正确答案】：B
【题目解析】：
非谓语的否定，not要放在最前面，所以不选AC，考虑这个动作发生在apologize for之前，所以要用having done。选B。句意：主人为没有考虑到有些宾客是素食主义者而道歉。
