问题补充:
—Can I help you, Madam?
— No, thanks. I.
A. have just looked around
B. just look around
C. just looked around
D. am just looking around
答案:
A. have just looked around
B. just look around
C. just looked around
(答案→)D. am just looking around
解析:此处用I am just looking around表示我只是正在随便看看,just可以和现在进行时连用,表示只是怎么怎么样。