—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
The air in Beijing is getting much ______ now than a few years ago.
The students asked Mr. Wang ______ them some advice on reading.
— What’s the news in today’s newspaper? — ______ special. Let’s go out for a walk.
You ______ do it if you really don’t want to.
When you’re learning English, just use it, ______ you’ll lose it.