Some of the rubbish, such as food, paper and iron, _____ away over a long period of time. 

The activity is held annually in Chinatown with the purpose of      the Chinese tradition.

—Did you have a chat with Tom?—No, I was trying to ________ an opportunity to do so, but I couldn't.

—Do you know how I can ____ him?—On his mobile phone．

He is very stubborn, it is impossible to argue _____________ what he doesn’t want to.