The little boy was last seen __________ football by the river.
__________ the tourists come from South Korea.
—Thanks for listening to my problem and ________ me your valuable advice.—__________.
---I’m too busy, could you do _______ to help me?--- Of course. I can do _______ for you if you want me to.
This piece of music is worth __________.
We had no choice but ____________ so much work.