19 I must apologize for ___ ahead of time.
问题描述:
19 I must apologize for ___ ahead of time.
That's all right
a.letting you not know b not letting you know c letting you know not d letting not you know 需要详细分析
答
B
有一个语法知识你可能不太了解,NOT 对V-ING 的否定是应该放在他们的前面,其他用正常的陈述语序.知道这一点是不是就觉得很简单了?