Our English teacher _____ all the exercise books last Friday evening.
A great deal of advanced science and technology has been ______ since China carried out the reform and opening policy.
Swan made a promise to his father _____ he would have himself home early.
________ having fun with friends, travelling around the world will be another way to relax and learn.
Chinese people place a person’s family name before the given name, _______ people in many other countries do the opposite.
----- Sorry to have knocked you down.----- ________. You didn’t mean to, did you?