问题补充:
The three of us around Europe for about a month last summer.
A. have travelled
B. had travelled
C. travelled
D. travel
答案:
A. have travelled
B. had travelled
(答案→)C. travelled
D. travel
解析:考察时态。本题容易错选A,现在完成时表示过去发生的事情对现在的影响,而在本题中看不出对现在的影响。而只是单纯的描述过去曾经发生过这样的事情,故使用过去时即可。