The three of us around Europe for about a month last summer.
A. travelled
B. have travelled
C. had travelled
D. travel
网友回答
(答案→)A. travelled
B. have travelled
C. had travelled
D. travel
解析：考查时态。句意：我们中的三个人去年夏天环欧洲旅行了大约一个月。根据时间状语“last summer”可知本句描述的是过去发生的动作，故用一般过去时态。选A。