Give the correct form of comparison

Give the correct form of comparison.
1. It's ( difficult) decision I've ever made in years.
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2. Mr. Bush is ( delightful ) person I have ever know.
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3. Dick is ( careful) of the three workers .
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4. Peter is ( tall) student in my class.
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5. What's ( good) film you have ever seen?
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6. Shi is ( old) child in the family.
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7. He is ( intelligent ) student in my class.
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8. Of the two sisters, Linda is ( beautiful).
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9. It is ( interesting) book I have ever read.
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10. This is ( big ) house I have ever seen .
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