The engineers spent the whole night (work) ______ on the new device.working本题考查对

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问题 The engineers spent the whole night (work) ______ on the new device.

选项

答案 working

解析本题考查对动词spend用法的掌握。其常用结构是spend time/money (in) doing sth．花费时间(金钱)做某事。如：They spent two years (in) building this bridge．造这座桥花了他们两年时间。

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