Combine the pair of sentences by using an appositive.

1. Mrs. Gage uncovered long rolls of yellow stones. They were an amazing sight.

A: Mrs. Gage uncovered long rolls of yellow stones, an amazing sight.

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To combine the pair of sentences by using an appositive, you first need to identify the noun or noun phrase that can be further described or identified. In this case, the noun phrase "long rolls of yellow stones" can be further described using an appositive.

Next, you want to find a word or phrase that provides additional information about the "long rolls of yellow stones." In this case, the phrase "an amazing sight" provides additional information and can be used as an appositive.

To combine the sentences, you can place the appositive right after the noun phrase and separate it with a comma. The combined sentence would then read: "Mrs. Gage uncovered long rolls of yellow stones, an amazing sight."