¶þ¡¢ÓïÑÔ֪ʶÔËÓÃ(±¾ÌâÓÐ15СÌ⡣ÿСÌâ1·Ö¡£¹²1 5·Ö)   
    ´ÓA¡¢B¡¢C¡¢DËĸöÑ¡ÏîÖУ¬Ñ¡³öÒ»¸ö¿ÉÒÔÌîÈë¿Õ°×´¦µÄ×î¼Ñ´ð°¸¡£
16. -Ann! What\'s that over there?
-It\'s_______ ruler. Grandma.
A. a                    B.  an            C.  the            D. /
17. This isn\'t________ pen.  I\'ve left mine at home.
A.  me                B.  my             C.  I               D myself