单项选择题

Franklin ______ learning astronomy at an early age.

A．set about
B．set out
C．set off
D．set up
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单项选择题
It is much easier to make a plan than it out.
A．carrying
B．carry
C．to carry
D．carried
单项选择题
Some people hope to be more successful while ______ simply want to feel more comfortable.
A．the others
B．others
C．the other
D．another
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