Robots may seem smart，but they cannot even pick up a chess piece. "Robots are klutzes（笨手笨脚）." said US AI engineer Ken Goldberg，"（1）

F

F

." Let's take a look at some tasks that are easy for kids but not for robots.
   （2）

A

A

   If we drop our pencil on the floor，our brains work hard.First，we must find the pencil and move our hands to it.A robot cannot always move its "hand" to the right place.Then，when we touch the pencil，it might roll（滚动）a little bit.Robots cannot easily understand this either.So，if you drop a pencil on the floor，a robot will probably roll it around the room.
Get around in our world
   If someone drops you in a building you've never been to，you might feel a bit lost.But you can look around，find a door and get out quickly.But a robot will look everywhere for a door，even on ceilings（天花板）and floors.（3）

E

E

.
   （4）

C

C

   "Common sense" is what we don't need to think or talk about.Because of common sense，we do not look for doors on the ceiling.We pick up a coffee cup by its handle（把手）.We feel whether it has coffee inside，and whether it is hot.A robot？（5）

B

B

.It may hold the hot part.Scientists have tried teaching robots common-sense rules.There are just too many rules and too many exceptions.Maybe they just need more time to learn.
根据短文内容从选项中选出能填入文中空白处的最佳选项，选项中有一项为多余选项。
A.Pick things up
B.It may turn the cup upside down
C .Understand the world made by people
D.Robots may wake you up and clean up the house
E.This is because it's hard for them to understand spaces
F.One-year-old human babies have better movement skills than robots do