单项选择题

A．forward
B．up to
C．toward
D．up and down
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单项选择题
Why are female butterflies safe from enemies
A．Because they are bigger.
B．Because they are heavier.
C．Because they cannot be seen with their wings closed.
D．Because they have colors that are not so bright.
单项选择题
A．above allB．after allC．all overD．all the while
A．above all
B．after all
C．all over
D．all the while
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