①________________，随风直到夜郎西。

②无可奈何花落去，________________。

③争渡，争渡，_______________。

④_______________，为有源头活水来。

⑤几处早莺争暖树，________________。

⑥母亲啊！你是荷叶，我是红莲，心中的雨点来了，除了你，_______________？

—With 3G mobile phones, people can even see each other as they talk.       

—Really? Would you show me        it, please?       [ ]

A. how to use    

B. when to use    

C. where to use    

D. what to use