The sales boy thought he could persuade the boss of the company _____ buying some e-books.
—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.
—She was late for the party.—That’s _________she had forgotten the exact time.