单项选择题
Plants with roots appeared about ______ million years ago.
A.430
B.300
C.330
D.100
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单项选择题
The subject discussed in this text is ______.
A.the process of reaching decisions
B.the difference between poker and chess
C.the secret of making good business plans
D.the value of information in winning games
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单项选择题
Which of the following can be used in place of Quite the reverse
A.Quite right.
B.True enough.
C.Most unlikely.
D.Just the opposite.
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