If you ever have the _____ to go abroad to work, you should take it.
If we don’t take steps, the Tibetan antelopes and pandas will ____ some day just as dinosaurs.
The whole Chinese people will never forget the day, April 20th, 2013, _______ the big earthquake happened in Ya’an.
-- Fifty-four students _____ my class and we are kind-hearted.--Really? _______.
The volunteers are doing _____ difficult and important work; they share _____ common goal — to help people in need.
----Go for a picnic this weekend, OK?----___________. I love getting close to nature.