You must be single-minded. Drive for the one thing on which you have decided.

你必须一心一意，一门心思地朝你所决定的事情前进。

youdao

You must let go of the idea that to be single is to be unhappy and unfulfilled.

你必须放弃单身就不快乐不满足的想法。

《柯林斯英汉双解大词典》

But first, you have to be single and you must be Catholic.

但首先你必须是单身的且你必须是天主教徒。

youdao

That means you must be single, divorced, or otherwise unmarried at the end of the tax year and (1) you paid more than 50% to keep a home for the entire tax year for a parent who was a dependent OR (2) you paid more than 50% to keep a home for the entire tax year with your dependent (there are some exceptions to this rule).

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