单项选择题

This energy comes from substances stored in the cells of the body. These substances ______ energy by combining with oxygen.

A．disperse
B．release
C．develop
D．transmit
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单项选择题
There are a lot of ______ and undernourished children in Somalia.
A．faint
B．fragile
C．frail
D．feeble
单项选择题
Parents have a legal ______ to ensure that their children are provided with efficient education suitable to their age.
A．impulse
B．influence
C．obligation
D．sympathy
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