How long is it ____ we last spent the holiday in the country together?
问题描述:
How long is it ____ we last spent the holiday in the country together?
a. since b until c. that
选A.B C错在哪?有什么用法区别?
答
A. since
从一个过去的时间点算起
B是从一个将来的时间点算起