Choose the answer that is correct and clearly expressed in Standard English.

The book, ______ I bought last week, is already falling apart.

Answer and explanation

Correct answer: B. which

  1. Step 1: Identify the clause type: the clause is enclosed by commas, making it non-restrictive (non-essential).
  2. Step 2: Non-restrictive clauses referring to inanimate objects take the relative pronoun which.
Answer
which.
Why not the others: That is used in restrictive clauses without commas, while who and whom refer only to people.

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