题目内容
2010—2011学年度第二学期高三综合练习
Schools in the north tend to be well equipped,______ those in the south are relatively poor.
A．once B．while C．as D．until
B
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题目内容
2010—2011学年度第二学期高三综合练习
Schools in the north tend to be well equipped,______ those in the south are relatively poor.
A．once B．while C．as D．until
B