Good morning，everyone，

　　I am Li Hua from Xingguang Middle School. The topic of my speech is “Let's Ride Bicycles”．

　　As is known to all，with the improvement of people's living standards，cars have become a popular means of transport，bringing great convenience to our life. However，they have also caused some problems such as air pollution and traffic jams. How can we solve the problems then？As far as I'm concerned，riding bicycles is a good solution. For one thing，bicycles don't need any petrol and they are energy­saving. For another，bicycles are environmentally friendly because they won't give off waste gas. What's more，riding bicycles is a good way for us to exercise and it is beneficial to our health. Therefore，let's take the responsibility to build up a low­carbon city by riding bicycles. Come on and join us! Thank you！ 【全品点睛】

　　①行文逻辑：自我介绍→汽车带来的问题→骑自行车的益处→发出倡议。较好地使用了连接和过渡成分，如连接词汇：however, as far as I'm concerned，what's more等以及过渡句：How can we solve the problems then.

　　②词汇短语：运用了较高难度的词汇。如：a popular means of，such as，for one thing…for another，give off, beneficial，take the responsibility，build up等。 ③句式句法：运用了多样化的句式和句法结构。如：非限制性定语从句：As is known to all；现在分词短语作伴随状语：…bringing great con­venience to our life；原因状语从句：…because they won't give off waste gas；祈使句：let's take…/Come on and join us！

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