What is the only foreseeable threat to the lumber industry？A．The cost of cutting down larg
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What is the only foreseeable threat to the lumber industry？
A．The cost of cutting down large trees.
B．The threat of the spruce budworm.
C．The rising number of imported workers.
D．The lack of physically fit employees.
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正确答案：B
解析：文中说，威胁木材产业的因素是“the possibility of the spruce budworm infecting large forests and destroying trees”，也就是树木被虫蛀，并且病虫害在树木之间有传染的可能性。