一道选择题：I wont't be able to attend the meeting____I'll be on holiday with my family.
问题描述：
一道选择题：I wont't be able to attend the meeting____I'll be on holiday with my family.
A:ifB:since C:though D:while
答案是B,我想知道为什么
答
A.如果 B,因为 C.尽管 D.当...时候
选A语句最通顺