The whole Chinese people will never forget the day, April 20th, 2013, _______ the big earthquake happened in Ya’an.
All languages change and develop when cultures _______ and communicate with each other.
I don’t want to end the friendship, but I hate others _______________.
It was the first time in _________ that I’d seen the night face to face.
Anne and her family hid away for nearly twenty-five months ________ they were discovered.
Life is tough in the city. In order to reduce their ______,some people drink alcohol(酒).