摘要： About one third of the population in Beijing and Shanghai netizens, but in poorer areas, only three or four percent online. A. is; is B. are; are C. are; is D. is; are
网址：http://m.1010jiajiao.com/timu_id_1678599[举报]
About one third of the population in
A. is; is B. are; are C. are; is D. is; are
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