Since we purchased the new equipment,_______has been significantly increased.

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问题 Since we purchased the new equipment,_______has been significantly increased.

选项 A、producer
B、produced
C、production
D、produces

答案C

解析 空格内应填入做主语的名词。根据可数名词的使用方法,A选项被排除。正确答案是意为“生产”的C选项。从语法和词义上来说都是最合适的。当produce表示“农产品”的意思时,为不可数名词。
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