问题
单项选择题
What these young men were doing（）a threat to the safety of the whole neighborhood.
A.constructed
B.contracted
C.constituted
D.contributed
答案
参考答案：C
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What these young men were doing（）a threat to the safety of the whole neighborhood.
A.constructed
B.contracted
C.constituted
D.contributed
参考答案：C
