问题
选择题
I would appreciate it ________ you call back this afternoon for the doctor's appointment.
A．until
B．if
C．when
D．that
答案
答案：B
if引导条件状语从句。
搜题请搜索小程序“爱下问搜题”
I would appreciate it ________ you call back this afternoon for the doctor's appointment.
A．until
B．if
C．when
D．that
答案：B
if引导条件状语从句。
