How long you ? -I swam for half an hour. [ ]A. have;been swimming B. have;swum C. do;swim D. did;swi

题目简介

How long you ? -I swam for half an hour. [ ]A. have;been swimming B. have;swum C. do;swim D. did;swi

题目详情

How long       you       ?
-I swam for half an hour.
[     ]
A. have;been swimming        
B. have;swum        
C. do;swim        
D. did;swim
题型:单选题难度:中档来源:同步题

答案

D

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