——With 4G mobile phones, people can even see each other as they talk. ——Really? Would you show me it, please?
— Have you finished your homework __________? — Yes, I’ve __________ finished it.
The terrible earthquake hit Japan __________ the afternoon _________ March 11th.
________ accident happened on the busy street because ________ driver drank too much.
--- How _______ is it from Xi'an to Dunhuang? --- It's less than 3 _______ flight.
He has _______ for two years.. Two years _______ a long time.