江苏省镇江市2009-2010学年度高二第二学期期中考试英语

适用年级：高二
试卷号：660349

试卷类型：期中
试卷考试时间：2017/7/20

1.单项选择(共1题)

Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of American households had it.

A．before	B．when
C．after	D．until

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试卷分析