China is one of ______ countries in the world.
---When will the railway that connects the two cities open? ---_____next year.Only two thirds been built.
Boys_________ model planes to dolls, while girls _________ have dolls than model planes.
Mr. Wang _______drive to work, but now he _______there by bike to keep healthy.
--- There is nothing wrong with your mobile phone,__________? --- _________, I’ll have Uncle Wang _________it.
Learning English can make _______ to talk with foreigners.