if you happen to go by___,___some aspirins.

问题描述:

if you happen to go by___,___some aspirins.
A a chemical:please buy
B a chemist's:do buy
do buy 怎么讲,
Open the door,
可以说Do open the door.
是强调意思吗

选B.
do 表示强调语气,"一定要"