We receive ten letters________each day. [ ]A. on averageB. on the averageC. on an average D. A, B an

题目简介

We receive ten letters________each day. [ ]A. on averageB. on the averageC. on an average D. A, B an

题目详情

We receive ten letters________each day.
[      ]
A. on average    
B. on the average
C. on an average    
D. A, B and C
题型:单选题难度:中档来源:同步题

答案

D

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