单项选择题

Probability is the mathematical study of the ______of an event's occurrence.

[A] predictability
[B] possibility
[C] feasibility
[D] undesirability

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单项选择题

______would they believe your explanation that you were late because you were kidnapped

[A] In what extent
[B] To what extent
[C] To which extent
[D] In which extent

单项选择题

Many people believe that there will be few problems in our life in the future ______.can be solved by computers and Internet.

[A] that
[B] which
[C] as
[D] but

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