单项选择：We have _____ school trip _____ this week.A.a;不填 B.a;at C.an;at
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
A,此处，school相当于一个形容词，修饰trip，又有have a trip；没有at this week之说，故选A
答
选A，正确
答
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.