straight on and you’ll see a post office . You won’t miss it .
A. Go
B. Going
C. If you go
D. When going
网友回答
(答案→)A. Go
B. Going
C. If you go
D. When going
解析：考查祈使句，祈使句使用动词原形，B．Going是非谓语动词用法C．If you go是If引导的条件句D．When going是when引导的时间状语从句，句子意思“一直往前走你将会看见邮局，你将不会错过它”