It is safe for people to ride it when they go to work, and the price is not very high. What’s more, they are friendly to the environment as they save energy and make low noise.
Also , there are manyproblems with them. For example, the batteries must be replacedafter having been used for 300 to 400 times. If they are not changed in time, they would cause pollution again.
My favourite swimmer is Sun Yang.He swims very fast.He took part in the last Olympic Games.He is my hero.
He is 21 years oid.He is very tall.He is 198cm tall.He is cute.I love him.
He is good at swingming very much, He has had all-round success in his study olypic games.
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