All we have is 24 precious hours a day and therefore we shall waste ______
_________we all know, Americans are competitive.
—Would you tell me ____you want your tea, with sugar or milk? —Sugar, please.
As your spoken English gets better, so ___ your written English.
I have only one day left ___ traveling to Kunming and then flying back home.
This is our contribution to ________ world of the 21st century, ________ world of independence and mutual understanding.