A clean environment can help the city bid for the Olympics,------in turn will promote itseconomic developmenta.what b.which c.that d .as

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A clean environment can help the city bid for the Olympics,------in turn will promote itseconomic developmenta.what b.which c.that d .as
A clean environment can help the city bid for the Olympics,------in turn will promote its
economic development
a.what b.which c.that d .as

A clean environment can help the city bid for the Olympics,------in turn will promote itseconomic developmenta.what b.which c.that d .as
b. which

D 引导非限制性定语从句

B