单项选择题

Water pollution, together with old tins and other forms of garbage,（）many problems in our large, industrial city today.

A．is causing
B．have caused
C．have been causing
D．are caused

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单项选择题
（）in the earthquake thoroughly, the city has now been rebuilt.

A．Destroying
B．Having destroyed
C．Destroyed
D．To be destroyed
单项选择题
As fuel prices rose, bus companies raised their fares, and（）

A．so did the airlines
B．neither did the airlines
C．so did the airlines have done
D．neither the airlines did
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