It becomes clear from the text that the driving force (动力)behind green products is ________. The underlined word "it" in the fo

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问题 It becomes clear from the text that the driving force (动力)behind green products is ________.
The underlined word "it" in the fourth paragraph refers to ________.

选项 A、a selling point
B、the company name
C、a great demand or health foods
D、the manufacturing of green products

答案D

解析 根据第四段最后一句“the manufacturing of clean an safe products”可知,答案 D是正确的。
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