Learning English seems easy _______, but it is not really easy if you want to learn it well.[ ]

Two hundred thousand three hundred and sixty means ___________.

The plane will take off _______ three hours. I must get to the airport right now. [ ]

―Why are you so happy?―Because the news _____ too exciting.

Do you know Xidan Girl?—Of course. She played _____ guitar and sang song in the 2010 Spring Festival Gala.