Unit 4 Our WorldTopic 2 I’m sure there are no UFOs
A rhyme （诗）Blue is the sea, green is the grass
White are the clouds, as they slowly pass
Black are the crows( 乌鸦 ), brown are trees
Red are sails （帆） ,of a ship in the breeze （微风）
making a fire A: I’m sure … Are you sure
InventionslightTVcomputer fire robot It was invented in 1921
They may take the place of (v
代替 )humans in some work situations （ n
They can also do lots of dangerous work instead of humans
What does Kangkang think of robots
He is sure robots can do some work better than humans
探测机器人高空无人侦察机月球车在月球 Good things Bad things2 、 3 、 4 、 6 、 71 、 5 练习：先填空完成句子，然后续写完短文 A Great Invention: Robots Robot was a great
It was invented in ,but before that, something like robots
Robots can do lots of things for us
But rob
