单项选择题

A．the villagers realizedB．did the villagers realizeC．th……

Not until all the fish died in the river ______ how serious the pollution was.

A．the villagers realized
B．did the villagers realize
C．the villagers did realize
D．didn't the villagers realize

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热门试题

单项选择题Taxi drivers often remind passengers to ______ their belongings when they leave the car.

A．hold
B．catch
C．grasp
D．collect

单项选择题We wanted to get home before dark, but it didn't ______ as we planned.

A．turn out
B．go on
C．make out
D．come up