11．16．The invention which is NOT mentioned isB． A．the alarm clock B．the light bulb C．the cellphone 17．A of the people felt that inventions had improved the quality of their lives． A.95 percent B.90 percent C.85 percent 18．Chen Mingming thinks that the bad thing of the cellphones isC． A．they bring people together B．many people can not use them C．sometimes the cellphones bother him 19．Wang Kun lovesA． A．computers and televisions B．cellphones C．movies 20．Wu Dong sold his TVA ago． A．one year B．two years C．four years．
