Question

We are going to have a picnic_______this month. A.in the end B.at the end C.on the end D.at the

We are going to have a picnic_______this month.
A.in the end
B.at the end
C.on the end
D.at the end of
正确答案是( ).

Answer 1

选择D，另外三个都没法在后面接this month，只有D短语最后有介词

Answer 2

D.at the end of 在……末期

追问

原因是什么？

追答

in the end 最终，词组是单独使用的
at the end + of + 时间
on the end + of + 物体，表示在某个物品的端头