單項選擇題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


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2.單項選擇題I can do that job（）myself.

A.by
B.on
C.with
D.–（不填）

3.單項選擇題It is（）that he has to ask for help.

A.so a big job
B.a so big job
C.a such big job
D.such a big job

4.單項選擇題They are（）students that they all performed well in the nationwide examinations.

A.so diligent
B.such diligent
C.so much diligent
D.such very diligent

5.單項選擇題Once he starts a job, he won't stop（）it is finished.

A.till
B.after
C.before
D.until