单项选择题

创新者是创新活动的（），是创新实践的决定性因素。
A、客体
B、主体
C、载体
D、灵魂

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单项选择题

由商品使用价值运动所引起的费用，如商品运输、商品保管、商品挑选整理等费用，属于（）

A.生产费用
B.生产性流通费用
C.纯粹流通费用
D.在m中扣除的费用

FE:
Sentence Combining
Combine the sentences in each set into a single clear sentence. Add the phrase/ words in the blank to make the sentence complete. Don't leave out any important details.
13. Robert and I went into the living room.There we talked. Our talk lasted for a couple of hours.

Robert and I went into the living room, _________ we talked for a couple of hours.
(1)

答案：填空(1)： where 。