◎ 题干
The number of people in the world _____ about 6 billion and large quantities of waste _____ each year.

A. total; has been produced
B. totals; is produced
C. totals; are produced
D. total; are being produced
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The number of people in the world _____ about 6 billion and large quantities of waste _____ each year. [ ]A. total; has been produced B. totals; is produced…”主要考查了你对  【一般现在时的被动语态】【主谓一致】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。