Question

complete the sentence with the word that best fits the overall meaning and tone. the tour guide claimed she could not put a price on the ______ masterpieces at the château de versailles. invaluable costly

Explanation:

The word "invaluable" means extremely valuable, beyond price. "Costly" just means expensive. Since the tour - guide says she can't put a price on the masterpieces, "invaluable" is a better fit as it implies their value is immeasurable.

Answer:

invaluable