单项选择题

A．It is a survival technique for babies.
B．To ease hostilities.
C．To make parents feel relaxed.
D．To fight diseases.
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单项选择题
A．To show off their wealth.B．To feel good.C．To regain their memory.D．To be different from others.
A．To show off their wealth.
B．To feel good.
C．To regain their memory.
D．To be different from others.
单项选择题
A．Taking sport participation as their main task.B．Taking their homework as their main task.C．Never paying attention to their health.D．Only liking playing computer games.
A．Taking sport participation as their main task.
B．Taking their homework as their main task.
C．Never paying attention to their health.
D．Only liking playing computer games.
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