I want to ring him _______ to know the reason why he rang _______ while I was speaking yesterday. [

题目简介

I want to ring him _______ to know the reason why he rang _______ while I was speaking yesterday. [

题目详情

I want to ring him _______ to know the reason why he rang _______ while I was speaking yesterday.
[     ]
A. back;  up      
B. up;  off        
C. up;   down      
D. on;  off
题型:单选题难度:中档来源:甘肃省期末题

答案

B

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