after the meeting,we will have a party.if you()free,come and join us.A.are.B.will be 选A还是B?为什么?
问题描述:
after the meeting,we will have a party.if you()free,come and join us.A.are.B.will be 选A还是B?为什么?
答
A,if的条件状语从句没有将来式