33. This year’s children’s party, ______ some parents were invited to, was a great success.
A
which
B
why
C
whose
D
where
根据题意，此处是定语从句，先行词是party，引导词在从句中作to的宾语，所以选which。 故选A.
本题是语法知识题。本句意思是：今年的父母被邀请参加的孩子的晚会非常成功。此处选A.
把握不准引导词。