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[参考范文]
Should Teachers Be ......

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Write on ANSWER SHEET TWO a note of about 50～60 words based on the following situation: You have promised to join your friend Mike’s party, but now you can’t go. Write to apologize and explain why. Marks will be awarded for content, organization, grammar and appropriateness.
单项选择题
Blood doping increases the capacity for oxygen delivery by
A．enlarging muscle fibers.
B．increasing blood flow.
C．raising hemoglobin count.
D．making an athlete’s mind active.
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