DrMaoperated_______over150patients_______hisvisittothatpoortown. [ ]A. in,while B. on,during C. for,

题目简介

DrMaoperated_______over150patients_______hisvisittothatpoortown. [ ]A. in,while B. on,during C. for,

题目详情

Dr Ma operated _______ over 150 patients _______ his visit to that poor town . 
[     ]
A. in, while 
B. on, during 
C. for, in 
D. on, for 
题型:单选题难度:中档来源:同步题

答案

B

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