1) you have nothing to do ,why not come with me to the interesting meeting?

问题描述:

1) you have nothing to do ,why not come with me to the interesting meeting?
*
A FOR
B BECAUSE
C SINCE
D WHEN

选C.since既然,以一个已成事实为理由
For因为,和because一样,要有较为明显的因果关系.