问题
单项选择题
My postcard is still on the desk. Why ______ you ______ it
A. haven't ; posted
B. didn't ; post
C. wasn't ; posting
D. won't ; post
答案
参考答案:A
解析: 现在完成时表明过去发生或已经完成的动作对现在造成的影响或后果。前一句话就表明了没有寄明信片的后果。故选A。