What (happen)in the Disneylang at this time yesterday?是用过去进行时吗?

What (happen)in the Disneylang at this time yesterday?是用过去进行时吗?
What (happen)in the Disneylang at this time yesterday?是用过去进行时吗?

What (happen)in the Disneylang at this time yesterday?是用过去进行时吗?
答案：【was happening】
解析；at this time yesterday翻译为昨天的这个时候,所以要用过去进行时态.
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是的，即What (was happening )in the Disneylang at this time yesterday?