摘要： concentrate
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| concentrate on so as to depend on look forward to defend...?against? accuse...of? |
1.We should our country invasion.?
2.The police John murder.?
3.It's too noisy outside.I can hardly my work.?
4.My little cousin is his birthday presents.?
5.Mail your package early ensure its timely arrival.?
6.It's not necessary for children to their parents all the time.?
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