单项选择题
A．a possibility
B．a certainty
C．a chance
D．a probability
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1.单项选择题
A．the rich
B．richer
C．rich
D．richness
2.单项选择题
A．brings
B．makes
C．causes
D．carries
3.单项选择题
A．In
B．With
C．For
D．As
4.单项选择题
A．operations
B．utilization
C．accomplishments
D．extreme importance
5.单项选择题
A．triumphed
B．beaten
C．seized
D．conquered
6.单项选择题
A．give up
B．give away
C．give in
D．what
7.单项选择题
A．capacity
B．conservation
C．consequence
D．constancy
8.单项选择题
A．at a time
B．at times
C．at time
D．in time
9.单项选择题
A．important extremely
B．extreme importance.
C．extremely importance
D．of extreme importance
10.单项选择题
A．while study
B．for studying
C．studying
D．while studying