After the busy times during the day, the robot will go for a “meal”. After a two­hour charge the robot can work continuously 7.__________ 5 hours.

　　The restaurant now provides a menu with more than 30 dishes, 8.__________ the average cost for a diner is 40 to 50 yuan.

　　Ⅲ.阅读理解

　　Two organizations have announced plans to send people to Mars within the next 10 years.

　　The Inspiration Mars Foundation, an American­based nonprofit organization, intends to send two people — probably a married couple — on a 501­day mission that will fly around Mars and return to Earth. They hope to launch in 2018. Mars One, a Dutch private company, wants to land a team of four people on Mars by 2023. These people will settle on Mars forever.

　　Mars is the most Earth­like planet we know, but it still is a very different world. Surviving on Mars will not be easy. Mars is a frozen desert, with no liquid water on its surface and a climate that makes Antarctica look comfortable. Mars' atmosphere is thinner than that of Earth. The little air there is mainly made up of carbon dioxide which is unfit to breathe. Strong radiation(辐射) from the sun and other stars reaches the surface and would ruin their health if residents didn't wear spacesuits in the open air.

　　Is there life on Mars? Not on the surface, most likely. Conditions are too harsh there. But microbial(微生物的)life might exist deep underground. Or maybe there are other forms of life, new to the earth. We just don't know. That's one of the reasons for going there.

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