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题型:单选题 题类:模拟题 难易度:普通

天津市河东区2021届高三英语第一次模拟考试试卷

The number of people in the world ______about 6 billion, and thus large quantities of waste ______each year.
A、totals; has been produced B、total; is produced C、totals; are produced D、total; are being produced
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