Задание

Look at the diagrams below and complete the paragraph with the following verbs. Type your answers in the table:

a. died and dropped b. was formed c. lived d. was covered e. was trapped f. turned g. is now mined h. built up.

The diagrams show the process which coal 1 _ over a period of millions of years. First of all, large plants 2 _ in enormous swamps a long time ago. These 3 _ to the bottom of the water. Over the years, the dead plants formed a layer, which became deeper and deeper. More and more earth and dirt 4 _ on top of this layer. Subsequently, this layer 5 _ by rocks and dirt and so the energy of the dead plants 6 _ underneath. As the pressure and the heat grew over time, the layer of dead plants 7_ into coal. Seams of coal were formed and coal 8 _.

1 2 3 4 5 6 7 8

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