______substantial layoffs, costs were reduced.

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问题 ______substantial layoffs, costs were reduced.

选项 A、When
B、Because of
C、Although
D、Since

答案B

解析 Because of indicates a cause-andeffect relationship and can be followed by a noun phrase. Choice(A)must be followed by a subject and verb. Choice (C)indicates an unexpected result and must be followed by a subject and verb. Choice(D)must be followed by a subject and verb when indicating a cause-and-effect relationship.
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