单项选择题

The water at the bathing beach became______by refuse from the factory.

A．pollute
B．polluted
C．polluting
D．being polluted

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单项选择题

The airline flies aeroplanes to cities like Paris（）

A.day and night, right through the week
B.two or three times a week
C.at any time of the day, but not at night
D.right through the day, two or three times a week

填空题

55（）