根据句子意思,用括号内所给词的适当形式填空。
1.Thebookwithabluecoverisoneofthe__________(twin).
2.Attheendofthatcoldwinterdaythey__________(decide)togoforawalkafterdinnertorelax.
3.IfinishedmyMathhomeworkanhouragobutIforgot__________(write)myEnglishhomework.
4.Thereisnothingwrongwith__________(keep)asnakeifyoulike.
5.These__________(video)aremadebysomestudentsasagiftfortheirteachers.
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