China is one of ______ countries in the world.
---A pianist will perform at Mingzhu Theater on Friday evening. Is it Langlang?---Yes, it ________ him. He ________ for a week.
I can’t wait __________ the film because I have kept ________ in line for two hours.
--- What a ! You must clean up your room, Li Lei. --- Sorry, Mum. I’ll do it now.
---All the volunteers(志愿者) were very tired, but ____ of them had a rest.---They were busy looking for the missing people.
---How far is it from Liaocheng to Jinan? ---It is a _______ train ride .