Complete the incomplete sentences with the appropriate form of be or have. the boiling point of water 212 f. carbon monoxide and sulfur oxides the most common pollutants. invertebrates no backbones. benzene six carbon atoms and six hydrogen atoms our solar system nine planets. scientific textbooks quite expensive. paleontology the study of fossils and other forms of life. iron and potassium both ten isotopes. an evergreen tree leaves all year round.

The boiling point of water is 212 f.
Carbon monoxide and sulfur oxides are the most common pollutants.
Invertebrates have no backbones.
Benzene has six carbon atoms and six hydrogen atoms.
Our solar system has nine planets.
Scientific textbooks are quite expensive.
Paleontology is the study of fossils and other forms of life.
Iron and potassium both have ten isotopes.
An evergreen tree has leaves all year round.