摘要： Beijing so rapidly that maps of the city go out of date almost as soon as they are published. A. changes B. has changed C. is changing D. has been changed
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Beijing ________ so rapidly that maps of the city go out of date almost as soon as they are published．
- A.changes
- B.has changed
- C.is changing
- D.has been changed
Beijing ________ so rapidly that maps of the city go out of date almost as soon as they are published．
[ ]
A．changes
B．has changed
C．is changing
D．has been changed