Underline the mistake and rewrite the correct one

Underline the mistake and rewrite the correct one.

1.      My brother enjoys hanging up with his colleagues at the local pub after work.
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2.      The more expensive the hotel gets, the most luxutious the amenities become.
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3.      The committee is working together to carry in a project to organise a charity event.
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4.      We must cut down out water pollution to project marine life and ecosystems.
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5.      More complicated the problem becomes, the more confused she feel.
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6.      They came down to food poisoning after eating at that restaurant.
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