单项选择题

A．By going on a diet.
B．By having fewer meals.
C．By doing physical exercise.
D．By eating fruit and vegetables.
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单项选择题
It was Mexicans that first used poinsettias on the hearth to celebrate Christmas.
A．Y
B．N
C．NG
填空题
A．suchB．oneC．anyD．some
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