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[单选题]
() their service, many taxi drivers in Shanghai are now learning everyday English.
A.Improving
B.Having improved
C.Improved
D.To improve
查看答案
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B.Having improved
C.Improved
D.To improve
A.voluntary
B.voltage
C.volcano
D.valuable
A.favorite
B.available
C.convenient
D.average
A.Sand, Service, Sunshine
B. Sea, Service, Sunshine
C. Sea, Sand, Service
D. Sunshine,Sand,Sea
B.transportation capacity
C.travel service
D.labor cost
A、Direct Network System
B、Domain Name System
C、Dynamic Network System
D、Distributed Network Service
A.正确
B.错误