分类：教育/科学-学习帮助
问题：一道英语选择题，HELP!IfI_______goshoppin 
If I _______ go shopping this afternoon,I would drop in on him.A./     B.can     .should     D.am going to答案选C  为什么？
回答：C
答案没有问题
这里是虚拟语气的用法
表示与将来的虚拟，if条件句用should +do ,主句用would /might +
do