选错改错(共5小题；每小题2分，满分10分)
A friend of him went to Americalast week.
A B C D
Did you work out itat lastjust now?
A B C D
Each ofthe studentshavea new desk.
A B C D
Please notputyour socksin your shoes.
A B C D
Did he do something for his ownsafety?
A B C D