The public transports system in many cities in the world（）by the local authority.<br>A:is still ran<br>B:are still run<br>C:are still ran<br>D:is still run

The public transports system in many cities in the world（）by the local authority.
A:is still ran
B:are still run
C:are still ran
D:is still run

出自：专升本

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