单项选择题

What is the author's attitude towards Bush's spaceflight program

A．Negative.
B．Positive.
C．Neutral.
D．Not mentioned in the passage.
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单项选择题
When plastics were invented a hundred and twenty years ago, _____________.
A．people found they were cold materials
B．their shapes were set permanent
C．people accepted them at once
D．they did not enjoy immediate popularity
单项选择题
What is the author's attitude toward all the laws against drunken driving
A．Optimistic.
B．Pessimistic.
C．Indifferent.
D．Not clear.
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