I have sent a letter to him and I e

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encouraged 鼓励
valuable贵重的
petition 竞争
stolen 被偷
priceless 珍贵的
detective侦探
guides守卫
airport 机场
neat 整洁的
thieves
were watching
had finished
======以下答案可供参考======
供参考答案1:
1.expect
2.valuable
3.petition
4.stolen
5.precious
6.detective
7.guards
8.airport
9.nice10.place11.thieves12.were watching13.had finished供参考答案2:1、eager2、vital3、canal4、stolen 5、precious6、detective7、guards8、airport9、neat10、pool11、thieves12、were watching13、had、finished