10.1.6 10.5.2 Put the sentences in the correct order 1-5. Which is the topic sentence? Suggest an alternative.A This means they are much better for the environment.B Therefore, they don't release additional carbon dioxide into the air.C First of all, they are carbon neutral. D There are many advantages to using biofuels in our vehicles. E In addition, they release fewer toxic fumes when they are used.

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