Don’t promise anything ________ you are one hundred percent sure.
—Do you think a radio is useful in learning English? —Sure. A radio can _____ listening English songs and reports.
—Do you know _____? —Sorry, I don’t know.
_____ the morning of December 1st, 2006, the 15th Asia Games _____ in Doha(多哈).
There are fifty students in our class, _____ of us _____ football.
—Hi, Lucy. Have you finished your homework yet? —No, just a half. I am really bored with so much homework. —_____