Sandy is _____Australian girl． She came to China for travelling with her parents last week．（　　）

A．aB．anC．theD．不填

It's been 100 years since the May Fourth Movement took place _____May 4，1919．（　　）

A．forB．inC．atD．on

_____did you celebrate the Dragon Boat Festival this year， Tom？

By making rice dumplings with my Chinese friends．（　　）

A．WhereB．WhenC．HowD．Why

Excuse me， can you teach me how to _____ this new word？

No problem． Look at my mouth and listen carefully．（　　）

A．proveB．pronounceC．prepareD．produce

I hear people can pay for almost everything by ZHI FU BAO in China．

Actually．It's _____ that people often go shopping without taking any paper money．（　　）

A．importantB．impossibleC．surprisingD．necessary