All the kids had a lot of fun ________Children’s Day. They sang and danced happily all day.

! I left my wallet in the desk and now it’s still here.—Lucky you! You should take good care of your things.

Studies show that MP3 people have made much use of_____ music may be causing hearing loss.[ ]

Our monitor always helps other students with their lessons and he never ______ any bad words about others.

下列各句中，没有语病的一句是( )