单项选择题

Is it important that he ________ his education in all ways

A．develop
B．develops
C．will develop
D．developed
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单项选择题
The ever-lasting inflation caused the rising of the living ________.
A．cost
B．expense
C．price
D．value
单项选择题
All living things must, ________ reason of physiological limitations, die.
A．on
B．to
C．by
D．for
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