I met your uncle on my way to school this morning.—Ah You _____ be joking. He flew to Germany yesterday evening!

It’s a wise _______ to wear a white tie. It matches your new suit well.—-Thank you very much.

下列各句中划线词的解释，正确的一项是（ ）

He came all the way to China for learning it better ______ for making money

They argued________the waiter________the price of the meal in the restaurant