Do you know who _____ paper?
A. discovered B. invented C. found D. found out
If you have a robot, you can have it do the _____ housework, because it won’t get _____ of it.
A. tired; tire B. tire; tiring
C. tired; tired D. tiring; tired
The boots are _____ designed and they can prevent us from _____ in the air.
A. specially; float B. especially; float
C. specially; floating D. especially; floating
The waste things _____ too much space.
A. take up B. take care C. take off D. take away
The robot uses _____ to take pictures of everything it sees.
A. cameras B. wheels C. hands D. batteries
Are you satisfied _____ the robot I bought two months ago?
A. in B. at C. with D. on
