—What time do we have to be at the gate?
—_______ passengers start to board the plane.
A. Hurriedly
B. Soon
C. Immediately
D. Since
—What time do we have to be at the gate?
—_______ passengers start to board the plane.
A. Hurriedly
B. Soon
C. Immediately
D. Since
C
immediately此处用作连词,引导时间状语从句,相当于as soon as。