填空题

It is amazing that so many people ______(愿为社区的利益做义务工作)．

【参考答案】

are willing to do voluntary work for the benefit of the comm......

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填空题
______(从童年到成年的过渡)is always a critical time for everybody．
单项选择题
What can you learn about the trademark protection in the U. S.
A．It prevents a product from being copied.
B．It tells the consumers what kind of product it is.
C．It gives the inventor or author exclusive right.
D．It is granted by the same office that grants the patent.
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