have picnic the park today Let’s a in (.)

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【答案】Let’s have a picnic in the park today.

【解析】

have a picnic野餐，the定冠词，表示特指，park公园，today今天，Let’s让我们，in在。根据所给的句号及单词可知是个祈使句，根据所给词义可以连成句子：让我们今天去公园野餐。故答案为Let’s have a picnic in the park today.