题目内容

请判断下列说法是否符合给定资料的内容。 B．由于使用地沟油能降低可观的成本，致使一些中小餐馆往往容易被卷入地沟油生产和销售的整个利益链条，而很多老字号和高档酒店，并没有自觉或不自觉地参与到利益链中。( )

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根据给定资料3—7的内容，请简要概述地沟油能存在于市场上的原因。要求：紧扣给定材料，全面准确，条理性强，不超过200字。

The pen ______ he is writing is mine.

A. with which
B. in which
C. on which
D. by which

______ was said have must be kept secret.

A. Whatever
B. Whichever
C. However
D. That

Jane wasn’t in when Jack came, was she ______, but she returned a few minutes later.

A. No, she was
B. No, she wasn’t
C. Yes, she was
D. Yes, she wasn’t