六、语法填空。
Robots often appear in books and films. Usually they can think, listen, talk and walk 30. ______ (easy) on two legs, just like humans. In fiction, robots have their own lives. They go to work every day, watch movies or join in all kinds of 31. ______ (activity) just like humans.
In our life, robots come in different shapes and sizes. Many robots look like humans and some of them can even speak. But in fact, they are very different 32. ______ us in lots of ways. They cannot see, hear or think by 33. ______ (they). They cannot laugh or cry 34. ______ they have no feelings. Someone has to build them and decide what things they will be able to do.
Robots help 35. ______ (make) our lives easier. They don't mind 36. ______ (do) dirty or difficult jobs, and can work for long hours without getting tired or bored. Some robots work in very dangerous situations — in deep sea or space 37. ______ (explore).
Scientists are trying to make much 38. ______ (good) robots all the time. Maybe every family will have its own robot to tidy their bedrooms, do the dishes or do other things in 39. ______ future! Do you believe so?

easily
; activities
; from
; themselves
; because
; (to) make
; doing
; exploration
; better
; the