单项选择题

A．It is advantageous to the brains.
B．It helps strengthen the heart.
C．It is good for improving muscle tone.
D．It helps develop mental toughness.
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单项选择题
A．$5. 00.B．$4. 50.C．$9. 00.D．$10. 00.
A．$5. 00.
B．$4. 50.
C．$9. 00.
D．$10. 00.
单项选择题
If there is an infection, the first thing to do is to stop it before get the wisdom tooth removed.
A．Y
B．N
C．NG
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