问题
单项选择题
I'm tired out. I ______ all afternoon and I don't seem to have finished anything.
A. shopped
B. have shopped
C. had shopped
D. have been shopping
答案
参考答案：D
解析： 根据all afternoon，可知本题表示持续性动作或者状态，故用进行时，因此可用排除法选D．表示过去已经开始且持续到现在并有一定影响的动作。