单项选择题

What is the woman studying

A．The basic structure of atoms.
B．The basic structure of molecules.
C．The basic structure of neutron.
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单项选择题
A．She is too busy.B．He is willing to help.C．It’s your problem.
A．She is too busy.
B．He is willing to help.
C．It’s your problem.
单项选择题
A．Friday,B．Saturday-night.C．Sunday.
A．Friday,
B．Saturday-night.
C．Sunday.
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