单项选择题

A．To determine whether the Earth’s temperature is going up.
B．To study the behavior of some sea animals.
C．To measure the movement of waves in the ocean.
D．To measure the ovement of waves in the ocean.
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单项选择题
A．Through food.B．Through air.C．Through insects.D．Though body fluids.
A．Through food.
B．Through air.
C．Through insects.
D．Though body fluids.
单项选择题
A．Their father is unable to keep his promise.B．Their father is going on a vacation without her.C．Their father isn’t telling her the truth.D．Their father doesn’t want to travel abroad.
A．Their father is unable to keep his promise.
B．Their father is going on a vacation without her.
C．Their father isn’t telling her the truth.
D．Their father doesn’t want to travel abroad.
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