作业帮john has been to the USA twice,对划线部分提问 划the USA_____ _____john_____twice?
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john has been to the USA twice,对划线部分提问 划the USA_____ _____john_____twice?
john has been to the USA twice,对划线部分提问 划the USA
_____ _____john_____twice?
john has been to the USA twice,对划线部分提问 划the USA_____ _____john_____twice?
where has John been (to) twice?
Where has John been twice ?