第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)
下面的短文后有2项测试任务：
(1)第23～26题要求从所给的6个选项中为指定段落每段选择1个最佳标题；
(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
2 3．Paragraph 1_________________
24．Paragraph 3_________________
25．Paragraph 5_________________
26．Paragraph 6_________________
27．Unlike traditional lightin9，LEDs do not give out heat So___________．
28．Edison’s bright invention is likely to be outdated because___________．
29．Something unexpected happened during Bower’S experiment when___________．
30．Over one quarter of energy consumption for lighting could be saved by 2025 if___________．
