—Do you remember _______ came to our city?—Yes. On December 25 last year.A. when the singing star B. how the movie star C. why the famous speaker
Follow your teacher’s advice, _______ you’ll make great progress in your English.
You _______ write the poem down. Our teacher will give us a copy.
Knowing how to _______ a map can help you when you are travelling in a strange place.
Now the air in our city is _______ than it used to be. Something must be done to stop it.
—The books are so nice, which one can I take? —Oh, you can take _______ of them. I’ll keep none.