问题描述：
英语翻译
我的信被错放在他的书桌上：
A letter for me was left _____ _______ at his desk
横线填什么
he was _____ the farm work in the field
我的信被错放在他的书桌上：
A letter for me was left _____ _______ at his desk
横线填什么
he was _____ the farm work in the field
问题解答：
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