Drug use accounts for approximately three-quarters of all reported cases of HIV in the country.

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问题 Drug use accounts for approximately three-quarters of all reported cases of HIV in the country.

选项 A、possibly
B、roughly
C、generally
D、specificly

答案B

解析 本题的四个选项都是副词。B项的意思是“粗略地,大体上”,与approximately“大约”意思相吻合。A项“可能地”,C项“总体上”和D项“具体地”都与题干的词义不符。
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