单项选择题

A．By eating various kinds of fish.
B．By eating large amounts of plants and small animals growing in very salty water.
C．By providing enough food for fish.
D．By increasing the salt in the water.
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单项选择题
A．King Charles I made ice cream popular in England.B．The Roman emperor Nero hired men to bring ice to cool his drinks.C．Marco Polo brought Chinese recipes for frozen milk to Europe.D．King Charles I wanted to keep the secret of ice cream for himself.
A．King Charles I made ice cream popular in England.
B．The Roman emperor Nero hired men to bring ice to cool his drinks.
C．Marco Polo brought Chinese recipes for frozen milk to Europe.
D．King Charles I wanted to keep the secret of ice cream for himself.
单项选择题
A．The driver of the blue car.B．The driver of the white Ford.C．Neither the driver of the blue car nor the driver of the white Ford.D．Both the drivers of the blue car and the white Ford.
A．The driver of the blue car.
B．The driver of the white Ford.
C．Neither the driver of the blue car nor the driver of the white Ford.
D．Both the drivers of the blue car and the white Ford.
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