My friend is ____ English. But he can ______ Chinese well.
A naval parade can provide a platform, _____ navies on behalf of different nations can communicate.
of four buses will take you to the station . We can take of them .
Is air the lightest thing in the world?– Not . Scientists from Zhejiang University have just developed the world’s lightest material.
_____ the weather like today? — It’s very cool.