Beijing is one of the in the world today.
| A．busiest city | B．busiest cities |
| C．busy city | D．busy cities |
相关试题
Please _________ the light when you leave the classroom.
| A．turn on | B．turn off |
| C．turn down | D．turn up |
—__________ do you exercise?
—Every day.
| A．How many | B．How much |
| C．How often | D．How long |
I want to go ________ for my winter vacation.
| A．somewhere different | B．different somewhere |
| C．anywhere different | D．different anywhere |
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