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
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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