I must apologize for________ ahead of time.” “It doesn'tmatter.”A．letting you not knowB．not letting you knowC．not letting you to knowD．letting you not know【精析与答案】 B.求详解
问题描述：
I must apologize for________ ahead of time.” “It doesn't
matter.”
A．letting you not know
B．not letting you know
C．not letting you to know
D．letting you not know
【精析与答案】 B.求详解
答
1.apologize for 后接动词ing形式.
2.let后面的动词只能是原形.
3.not是放在行为动词前用的.