选出句中错误的一项并改正。
( )（1） Iwant to be an policeman . 
A BC
( )（2） Lucy want to goto China.
A B C
( )（3） Lookonthis .
A B C
( )（4） My father area writer
A B C
( )（5） That is a good ideas .
A B C
( )（6） ____ about your aunt ? A. How B. Who C. Where
( )（5）Tom often helps people ____ his work . A. on B. at C. in
( )（4） She ___ great in her uniform . A. look B. looks C. looking
( )（3） Can ____ guess ?A. your B. his C. you