单项选择:We have _____ school trip _____ this week.

问题描述:

单项选择:We have _____ school trip _____ this week.
A.a;不填 B.a;at C.an;at

答案:A.a;不填
首先,have a trip 旅游:
其次,时间状语的“this week”前面不加介词.