单句改错。 1. Young people usually have more

问题：

单句改错。

1. Young people usually have more energies than the old.

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2. Only by this means you can manage to solve the problem.

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3. The doctor suggested me to give up smoking.

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4. Every time when I catch a cold, I have pains in my back.

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5. Who do you think is to be blamed for the fire?

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