Question

阅读短文，根据短文内容，在其后的句子中填上恰当的词，每空一词。

Many, many years ago ,there were great forests on the earth. The trees died． They fell down, lay on the ground and became covered with earth. The trees of the old forests lay under the ground． The trees lay there for thousands of years. After a long time the wood was changed． It became black and hard． It became coal(煤).Coal is not only used for burning. It is also used for many other things. For example, we can get beautiful colour from coal. The matters to colour the walls of rooms are from coal. Coal is the most useful thing in the world．

1．Most of the earth was ________ with trees many ________ ago.

2．The ________ trees under the ground could be changed into ________.

3．Coal is used for ________ and many other ________.

 

Answer 1

答案：
解析：

1．covered，years,2．dead，coal,3．burning， things／matters