Invertors are always looking for ways to make our lives easier，greener and more fun．Take a look at 2010's coolest inventions in science and technology．What in the world will inventors dream up next？
Robot Teachers
Some students in South Korea have a new language teacher：an English-teaching robot．The robot help students practice speaking English．South Korea needs about 30，000foreigners to teach English．The robot teachers are helping to solve a shortage（短缺）English teachers．Could robots take the place of the human teachers one day？
A Touch Tablet （书写板）
Apple，creator of the iPhone and iPod，had anotherhit invention this year with iPad．The iPad is a touch-screen tablet computer．It gives users video，websites，books and games at their fingers．Apple sold 3million iPads in the first 80days on the market．
Up，Up and Away
It took him 30years to develop it，and now Glen Martin's is ready to take off．The Martin Jetpack （喷气动力背包），a personal flying machine，allows the users to fly 2.4km into the air．Unfortunately，you can not fly for very long．The jetpack only holds the fuel（燃料） for about 30minutes'flight．It will sell for S 100，000．Field tests begin in 2011．
71．The robot teachers can___
A．train students to speak English
B．help students learn Japanese and English
C．take the place of the human English teachers now
72．The underlined word"hit"means___．
A．撞击 B．妙语 C．成功
73．Glen Martin spent___on his flying machine．
A．a very short time B．quite a long time C．just a little money
74．Which invention can you use to fly in the air？___
A．The iPadB．The robotC．The Martin Jetpack
75．The best title for this passage may be___
A．Coolest Inventions of 2010
B．Most Useful Comouter of 2010
C．Greatest Discoveries of 2010．