Period Three　Lesson 3　Clean Machines

Ⅰ.单词检测

1．petrol/gas n．汽油

2．solar adj.太阳的，太阳光的

3．sunlight n．阳光，日光

4．chapter n．章节

5．impression n．印象，感觉

impress v．使印象深刻

6．reliable adj.可靠的

rely v．依赖，依靠

7．operator n．操作人员，接线员

operate v．操纵，操作

8．appreciate vt.欣赏；感谢

appreciation n．欣赏；感激；鉴别

Ⅱ.短语检测

1．so far迄今为止

2．take part in参加

3．take place发生；举行

4．have a good impression of对......有好的印象

5．persuade sb.of sth.说服某人相信某事

6．complain about抱怨

7．get on with sb.与某人相处

1．People have been worried about pollution caused by fuels like petrol and gas for a long time now.

现在人们一直为汽油、煤气等燃料造成的污染担忧。