The twins will go fishing with us this weekend _____ they are free.A though B if C whether D but
问题描述：
The twins will go fishing with us this weekend _____ they are free.A though B if C whether D but
答
b
答
B 如果
句子的意思是这对双胞胎这个星期将会和我们去钓鱼，如果他们有空的话
答
B
条件状语从句,主将从现
如果双胞胎有空,他们就在这个周末跟我们去钓鱼
答
B