从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. —Would you mind if I asked you where you’re from?
— _________.
A. Of course. I’m from London. B. Sure. I was born in London.
C. Not really. You can do it. D. Not at all. I’m from London.
22. Only when _______ hard _______ make your dream come true.
A. do you work; you can B. you work; you can
C. do you work; can you D. you work; can you
23. Most of us still wonder _______ it is _______ makes those honest peasant workers, without being paid at all,
