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Jack is our monitor Why is Jack What is Jack? Jack is t_____in music is he jack? Is he Jack? In Jack GreenJack is a______name. This letter is .jack jack' he My name is Jack.（同义句）() () Jack.My name is Jack.（同义句）() () Jack. His name is Jack London.Jack is his______ name? Jack is my n_____ friend Jack is playing ________ John. jack is a_______ my friend Jack is from america.翻译 He is jack,my brothers. -IS jack in the library? Jack is an English boy. jack is a four-old( ).