Fill in the blank with the most appropriate word.

Second-hand furniture ______ here at reasonable prices.

is sold

Second-hand furniture is sold here at reasonable prices.

Explanation:

• Is sold: This is the correct form to use. The sentence is describing a general truth or fact, and in this case, it's talking about the ongoing activity of selling second-hand furniture at the location.

• Were selling: This form is not appropriate because it's in the past tense, which doesn't match the present context of ongoing sales.

• Has sold: This form is not correct either because it indicates a completed action in the past, rather than the ongoing activity of selling.

• Are sold: This form would be correct if you were describing the current state of the furniture. However, in this context, you're describing an ongoing activity, so "is sold" is the more suitable choice.