适当形式填空：1.Titanic ___ in the Atlantic on the night of 10 April,1912(sink)
2.We mustn't throw ____ cigarette ends everywhere.(burn)
3.Terry ____ a DVD in the shopping mall yesterday.(buy)
4.Don't worry,Mary.I ____ the flowerpots inside already.(put)
5.We use scissors for ____ things.(cut)
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