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
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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
The author once heard a young man who for thirty minutes ______.
A. interrupted an outstandingly witty speaker
B. in a group of witty people, hindered a prince from making a speech
C. in a group of witty people did not allow a prince to get a word in edgeways
D. delayed the speech which a prince was about to deliver to a group of intelligent people
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