Exercise 2: Choose the best answer

DO ALL VOLCANOES ERUPT ?

Some volcanoes are always (1) ______. They are called active volcanoes. Mount Etna in Italy is an active (2) ______. Some  volcanoes have not erupted since prehistoric times. These are (3) ______ extinct volcanoes. Most of the  Hawaiian Islands are extinct volcanoes. These volcanoes (4) ______ have a hot spot under them. They (5) ______erupt anymore. Some volcanoes have not erupted for a long time, (6) ______ they could erupt again. These are called dormant volcanoes.

Scientists try to figure out (7) ______ volcanoes will erupt. Studying volcanoes is hard and dangerous work. Scientists drill into volcanoes. They (8) ______ maps of the inside of the volcanoes. They use satellites to study volcanoes (9) ______ space. Scientists have been able to predict a few eruptions. But it is not (10) ______ to tell what a volcano might do.

• A. 
  erupting
• B. 
  running
• C. 
  going
• D. 
  firing