单项选择题

A．Study in a quiet place.
B．Improve her grades gradually.
C．Change the conditions of her dorm.
D．Avoid distractions while studying in her dorm.
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单项选择题
The hydra is a kind of ________.
A．flatworm
B．coelenterate
C．sea anemone
D．nerve cell
单项选择题
What is the relationship between the color of the tomatoes and lycopene
A．The light red tomatoes do not contain lycopene.
B．The darker green and yellow the tomato is, the less lycopene it contains.
C．The lighter red the tomato, the less lycopene it contains.
D．Green and yellow tomatoes contain less lycopene.
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