问题描述：
I would appreciate it _____ you call back this afternoon for the doctor's appointment.
A,until B.if C.when D.that 请问应该选哪个?我怎么觉得BC都可以呢?
A,until B.if C.when D.that 请问应该选哪个?我怎么觉得BC都可以呢?
问题解答：
我来补答展开全文阅读