Topology is a branch of mathematics that abstracts and generalizes the concept of space.

He was infected with hepatitis E.

He is receiving treatment for hepatitis C.

Hepatitis D is a viral disease that is transmitted through blood.

I repaired the broken vase using instant glue.

He has already finished writing the report, so we use the present perfect form.

We play golf at the country club on weekends.

I used cyclononadecane in an organic chemistry experiment.

This compound has cyclohexadecane as its main component.

This compound contains cyclotetradecane.