单项选择题

A．Indifferent.
B．Surprised.
C．Worried.
D．Confident.
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单项选择题
If a person is not good at typing, he will probably prefer ______.
A．text messages
B．e-mail over v-mail
C．oral/aural messages
D．reading messages rather than listening to them
单项选择题
To define science we may simply call it ______.
A．classified knowledge
B．the study of unrelated fields
C．the study of unrelated subjects
D．an attempt to explain natural phenomena
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