单项选择题

College students in this city have set up "the Cleaner Air Society" to help urban citizens become aware of the to our environment.

A．conditions
B．situations
C．dangers
D．threats
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单项选择题
The most successful way to solve the language problem while a foreign play is being performed is ______ translation.
A．instantaneous
B．spontaneous
C．simultaneous
D．homogeneous
单项选择题
While both plans were perfectly sensible, only one seemed ______ in China's particular situation.
A．available
B．feasible
C．resolvable
D．presumable
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