问题
选择题
—Alice,why didn’t you come yesterday?
—I __________,but I had unexpected visitor.
A．had
B．would
C．was going to
D．did
答案
C
从对话but后面分句的含义为“但我却有一位不速之客须接待”。由此可推知其前分句表述的意思应为“我正打算要来（我本打算要来）”。故惟有C项可表达此意，若B项改为would have亦正确。