Sam has finished his homework.（改为过去完成时）
Sam had finished his homework.
Sam had finished his homework.

【考点】过去完成时．

【答案】Sam had finished his homework.

【解答】

【点评】

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发布：2024/4/20 14:35:0组卷：3引用：1难度：0.7

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Sam has finished his homework.（改为过去完成时） Sam had finished his homework.Sam had finished his homework.