Question

complete the sentence with the best relative pronoun. the leather sandals i purchased last week are still on sale.

Explanation:

To complete the sentence, we analyze the relative clause. The antecedent is "the leather sandals" (a thing), and in the relative clause "I purchased last week", the relative pronoun acts as the object of "purchased". For objects (things), we can use "that" or "which" (or "whom" for people, but here it's a thing). Since it's a defining relative clause (providing essential info about the sandals), "that" or "which" work, and "that" is common here. Alternatively, "which" could be used, but "that" is more typical in defining relative clauses with a thing as the object.

Answer:

that (or which)