四、閱讀選擇：
（一） Volcanoes
        A volcano is a hole in the ground through which molten rock and gas from beneath the surface of Earth can escape.This escape called an eruption happens when the pressure of the molten rock and gas is so great that it must find a way to the surface. The word “volcano” comes from the name Vulcan, who was the Roman god of fire.
         When a volcano erupts, lava, molten rock with gas, and ash shoot out of the hole in the ground. The lava flows downwards and destroys everything in its path. The gas and ash go into the sky. Sometimes, as in the recent volcanic eruption in Iceland, there is so much ash that jet aircraft cannot fly through it. The jet engine works by sucking in air. If it sucks in too much ash, it cannot work.
         There are about 1,500 volcanoes in the world. Most are not active. Some are erupting continuously. Most volcanoes are in a belt of land called the Ring of Fire. This is an area of land and water that encircles the Pacific Ocean.
         One of the most famous volcanoes is Vesuvius in Italy. When it erupted in 79 CE(公元), it destroyed the city of Pompeii.

molten(adj.) 熔化的 eruption(n.) 爆發 lava(n.) 火山岩 destroy (v.)破壞 jet aircraft(n.) 噴射機 suck (v.)吸
encircle(v.)環繞；包圍 explode(v.)爆發 explore(v.)探究

【題組】1. The word “volcano” comes from _____.
(A) Iceland
(B) Pompeii
(C) the Ring of fire
(D) the name of a Roman god