Question

complete the sentence with the best relative pronoun. the vehicle liz drives needs new brake pads.

Explanation:

To solve this, we analyze the relative clause structure. The clause "Liz drives" modifies "the vehicle", a thing. For non - human objects in relative clauses, when the pronoun is the object of the verb (here "drives" has "the vehicle" as its object), we can use "that" or "which". In this case, "that" is commonly used in such defining relative clauses (and "which" could also work, but "that" is more typical for this context).

Answer:

that (or which)