Here is the sentence:

At first, Rose __________ to tolerate Simon's lack of punctuality. His good looks compensated for her having to wait an extra ten or fifteen minutes. But once Simon's tardiness hit half an hour, Rose dumped him for a boyfriend who looked at his watch.

The blank requires the past tense of choose, an irregular verb. You picked chose, the correct form. Nice work, grammar brain!

Verb Simple Present Simple Past Past Participle
choose choose(s) chose chosen

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