选出句中错误的一项并改正。
( )(1) We are an happy family .
A B C
.
( ) (2) I am at Class Two , Grade Five .
A B C
( ) (3) We love us father and mother .
A B C
( ) (4) Letme introduce my parents for you .
A B C
( ) (5) I want to be a policeman at the future .
A B C