21
．I found myself sitting next to _______ George Bush! Not _______ George Bush, of course, but someone with the same name．
A．不填；a B．不填；the C．a; 不填 D．the; 不填
22．—I wonder if I can use your camera．
—I don’t have _______．But my roommate does．He bought _______ last month．
A．one; one B．it; one C．it; it D．one; it
