一道选择题:I wont't be able to attend the meeting____I'll be on holiday with my family.A:if B:since C:though D:while答案是B,我想知道为什么

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:if B:since C:though D:while
答案是B,我想知道为什么

A.如果 B,因为 C.尽管 D.当...时候
选A语句最通顺