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When we got down to work,a lot of difficulties ______ (arise).请教此空填什么时态,

分类: 作业答案 • 2022-01-31 20:22:32

问题描述：

When we got down to work,a lot of difficulties ______ (arise).请教此空填什么时态,

答

arose -------- 主过从过.
我们开始工作时,有许多困难.