单项选择题

What did FBI use as an investigative tool().

A. National Security Bills.
B. National Security Letters.
C. US Code.
D. Human Rights Bills.

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单项选择题
What is the average starting salary this year().

A. $46,000.
B. $50,000.
C. $55,000.
D. $56,000.
单项选择题
How many people were killed at least().

A. Two.
B. Three.
C. Four.
D. Five.
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