A．The sensors hidden inside can help players run faster in a game.

　　B．It can help players to improve their shooting and ball­handling skills.

　　C．It allows players to connect to their smartphones while playing basketball.

　　D．The Bluetooth chip inside allows its users to listen to music while playing basketball.

　　【解析】　推理判断题。根据第二项发明的标题“Coaching basketball”和本项发明介绍的最后一段可推知，94Fifty Basketball的最大特点就是可以像教练一样帮助提高球员的打球技术，即B项正确。

　　【答案】　B

　　3．What can we learn about the hovercraft from the text?

　　A．It enables its users to float off the ground freely.

　　B．It can work on many different kinds of surfaces.

　　C．It still needs to improve its power and efficiency.

　　D．It is an affordable means of transport for a family.

　　【解析】　推理判断题。根据第三项发明介绍的最后一段的第一句“At the moment，the hoverboard(悬浮滑板)can only float an inch off the ground for 15 minutes and must fly over a metal material”可推知，悬浮滑板在电力和效率方面有待提高，即C项正确。

　　【答案】　C

　　4．What do the hovercraft and wireless electricity have in common according to the text?

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