What you are supposed to do and not to do is called .
[ ]
A. customs
B. customer
C. costume
D. custer
B. customer
C. costume
D. custer
He started walking when he was ______.
[ ]
A. 2-year-old
B. 2 year old
C. at age of 2
D. 2 years old.
B. 2 year old
C. at age of 2
D. 2 years old.