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。
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。