问题
选择题
Mrs Black isn’t in and I’ll have to ring ______. I would appreciate it if you ring _____ after 6 o'clock?
A．off; back
B．up; off
C．out; up
D．back; off
答案
答案：A
Black女士不在家, 我现在不得不把电话挂上了; 要是你在6点钟后再来个电话我将不胜感激。ring off挂断电话；ring back回电话；ring up 打电话；ring out响起；宣布离去。