已知x﹣y=7，xy=2，则x²+y²的值为（　　）

用所给的单词的适当形式填空

①This is the ____ (one) time for me to see you.

②November is the ____ (eleven) month of the year.

③  My ____ (sister) birthday is on November 12.

④  September 10 is ____ (teacher) Day.

⑤  ____ (she) birthday is on May 5.

⑥  The ____ (five) lesson is very interesting.

以下行为中属于严重违法行为而应该受到刑罚处罚的是（    ）