英语高手进：改错,将下列句子（看补充）的错误代号填写在（ ）中,并在横线上把错误的改过来
My mother are making the bed.( )____
(A) （B) (C)
I is baking a cake ( )____
A B c
Peter is swming now.( )_____
A B C
The dog is bark to Mingming ( )____
A B C
还有一些......
They is waiting for a bus
A B C
John falls over yesterday
A B C
I am 10 years old in 2007
A B C