小题1:studying hard
小题2:charities, were
小题3:I can sing along with
小题4:came out
小题5:worry about
小题6:can’t
小题7:He would rather walk than take a bus.
小题8:Be sure to finish your homework.
小题9:Dandong is a good place to have fun.
小题10:You used to be fat, didn’t you?
小题11:I should be allowed to choose my own friends.