13、—Did he go back home very late last night?
—Yes. He didn't leave __________he finished writing the report.
A．because B．until C．since D．when
科目：初中英語 來源： 題型：
—Did he go back home very late last night?
—Yes. He didn't leave __________he finished writing the report.
A．because B．until C．since D．when
科目：初中英語 來源：河南省鄭州市回民中學2010屆九年級第三次質量檢測英語試題 題型：017
－Did he go back home very late last night?
－Yes．He didn't leave ________ he finished writing the report．
because
until
since
when
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