is that necessaryの例文

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1. "Is that necessary ? " said one.
2. Is that necessary to protect the integrity of the game?
3. Hence the rule is that necessary expenses for obtaining the income ( contract ) are deductible.
4. But why is that necessary, I ask ? talk ) 19 : 49, 13 April 2012 ( UTC)
5. Is that necessary; it's pretty costly to do that, and I wonder if I really need to.