Question

Use the words below to complete the sentences.

run out challenging creatures risk surface

1. Underwater cave exploration can be Answer
and dangerous, and divers often Answer
their lives on expeditions.
2. Divers have to come back up to the Answer
before they Answer
of oxygen.
3. The bottom of the Mariana Trench is completely dark and very cold, but there are some

Answer 1

Underwater cave exploration can be challenging and dangerous, and divers often risk their lives on expeditions.

Divers have to come back up to the surface before they run out of oxygen.

The bottom of the Mariana Trench is completely dark and very cold, but there are some creatures living there.