单项选择题

It can be inferred from the first paragraph that long time ago many people did not know the sky is __________.

A．a circle
B．space
C．a star
D．a planet
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单项选择题
The male mosquito __________ with his mouth.
A．can only drink plant juices
B．can get blood
C．can eat anything
D．Both A and B
单项选择题
Larvae are __________.
A．baby mosquitoes
B．mosquito eggs
C．animal skin
D．male mosquitoes
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