单项选择题

A．Seasonal variations in nature.
B．How intelligence changes with the change of seasons.
C．How we can improve our intelligence.
D．Why summer is the best season for vacation.
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单项选择题
A．They may not be able to take their vacation.B．It may snow during their vacation.C．They me going to need more money.D．They may miss graduation.
A．They may not be able to take their vacation.
B．It may snow during their vacation.
C．They me going to need more money.
D．They may miss graduation.
单项选择题
A．4B．3C．7D．8
A．4
B．3
C．7
D．8
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