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单项选择题

A．the fish is too small B．the fish is too big C．the fis……

According to the notice，people cant eat the fish from these waters mainly because ().

A．the fish is too small
B．the fish is too big
C．the fish is polluted by mercury
D．the fish is polluted by the water from factories

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填空题雨一直下了三天。________________ for three days.

单项选择题When the children were very young, ________.

A．they didnt know who Father Christmas was
B．they knew that Father Christmas wasnt real
C．they thought their father was Father Christmas
D．they knew who put the presents into their stockings

单项选择题Acid rain ________.

A．is only bad for living things
B．can be produced in factories
C．doesn’t do harm to people， but its bad for plants，animals and buildings
D．doesn’t just do harm to human beings but to animals，plants and buildings