isis击落俄罗斯客机:新概念二册....
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1.He has been ringing up continually ____ lunchtime.
2.We waited ____ ages.
用since for ago 填空
翻译出来
2.We waited ____ ages.
用since for ago 填空
翻译出来
since / for
1,since"自从"
2,for表示时间段
1.SINCE
2.FOR