用反证法证明“已知平面内的三条直线a，b，c，若a∥b，c与a相交，则c与b也相交”时，第一步应该假设____ 

成为研究中亚、印度半岛以及我国新疆地区历史和佛学的重要典籍的是(   )

根据首字母提示完成下列短文。

    A good class monitor gets on well w____ classmates and likes to h____ others. He often cleans the classroom and makes the classroom c____ just like h____. C____ him to be your monitor.

      Ann is   1  American worker. She works2a big factory(工厂) in America. It's 3in the morning. Ann 4 up. She is sitting on the bed. She is putting  5her clothes. She  6nothing to do today.
     Now Ann  7  at the table. She is    8 her breakfast. There is a cup of orange and some bread on the table. Ann is  9  the orange and eating the bread. She is  10today's newspaper.