At the present time the brush can NOT be used to ______.
A. sweep up tiny pieces of nanodust
B. paint microstructures
C. soak toxins from water
D. find medical uses
The hitchhiker left the bag with a gun in it behind because ______.
A. he wanted to give her a warning
B. he had not expected that the woman would leave him behind in the rain
C. it was his present for her
D. he wanted to kill her with the gun
Your story is perfect; I've never heard ______ before.
A. the better one
B. the best one
C. a better one
D. a good one
According to the first paragraph, human beings' attitude towards the early computers can best be described as ______.
A. indifferent
B. ambiguous
C. contemptuous
D. hostile