B.They can take the place of drivers now.

　　C.They can make cars run without fuel.

　　D.They can help people drive more safely.

　　7.In Kendall's opinion, who probably don't rely on the driverless cars at first?

　　A.Managers in the high tech company Google.

　　B.Officers from the U. S. government agency DARPA.

　　C.Car consumers.

　　D.Vehicle designers.

　　8.According to Richard Mason, what is the biggest challenge for driverless cars?

　　A.They need to have more comfortable seats.

　　B.They are now too expensive for consumers.

　　C.They are travelling at a low speed.

　　D.They are not favored by car racers.

　　C

　　One afternoon last week, I saw three tearful children from my son's school being comforted by teachers.That morning, my 11­year­old son had stomach pains, retching (干呕) into a bowl.Talking to other mothers later, I heard about other children with stomachache or difficulty sleeping the night before.

　　What caused so much pain？Sports day.Sports day might be necessary at a highly­competitive independent school, but not at a village primary school.For the children who can fly like the wind, sports day causes no problem.For those who are overweight or just not good at sport, it is a nightmare (噩梦).Even for those who enjoy running but fall halfway down the track in front of the entire school and their parents, it can prove a disaster.

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