Many insects have simple eyes.

He spends a lot of time studying.

He reads a lot of books.

His hobby is collecting insects.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

He is an expert in entomology, especially knowledgeable about butterflies.

Insects are an important part of the natural world.

He is world-famous as an entomologist.