根据短文内容在空白处填写一个适当的单词. Fire can be very useful, but it can also be very (1) . Be careful when you start a fire. Millions of years ago, early men used a stick, a large (2) of wood and dry leaves to 题目和参考答案——青夏教育精英家教网—

题目内容

根据短文内容在空白处填写一个适当的单词。

　　Fire can be very useful, but it can also be very (1) _____. Be careful when you start a fire.

　　Millions of years ago, early men used a stick, a large (2) ____ of wood and dry leaves to make a fire. Early men found fire very (3) ____. At first, they ate raw meat. Then they discovered fire and started eating (4) ____ food. At night, they used fire to (5) _____their families from wild animals. They also used fire to give them light and keep them warm in winter.

　　Nowadays, people do not only use fire to (6) _____ food or boil water. In factories, workers use it to melt metals. Metals are melted so that they can be made (7) ____ different shapes.

　　Factory workers also use fire to make glass. Have you ever seen workers blowing glass? They make bottles and vases of different sizes and shapes by (8) ____ glass. First, the workers put some hot glass onto one end of a long metal pipe. Then they start blowing from the other end of the pipe.

　　In some places of the world, people use fire to (9) _____ rubbish. Every day, they collect and burn a huge amount of rubbish. Fire can (10) ____ everything. We have to be careful when we use fire. People may lose their lives and homes or they may be seriously injured in a fire.

　　Every year, hill fires burn a lot of trees. This is because there are many (11) ____and thoughtless people. Careless people forget to put out their barbecue fires. (12) ____ people drop burning cigarette ends everywhere.

答案：harmful;piece;useful;cooked;protect;cook;into;blowing;burn;destroy;careless;Thoughtless
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