Today is ______ unusual day because his dream of entering _______ university has come true.

Surely it doesn’tmatter where the student associations get their money from; what _______ iswhat they do with it

In asports team each player has a clear role，and there are few _______when members areuncertain of their roles

The rivers will become dirtier and dirtier ______ we take action to protect them.

My name is Tony Smith. Smith is my _____ name.