––Beijing is a big city, isn’t it?
––Yes. In fact, it’s one of ____ cities in the world.
| A．big | B．bigger | C．biggest | D．the biggest |
––Beijing is a big city, isn’t it?
––Yes. In fact, it’s one of ____ cities in the world.
| A．big | B．bigger | C．biggest | D．the biggest |
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