Take another look at 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 sentence requires the past tense of choose, an irregular verb. Chose is the simple past form.

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

Choose, the form you picked, is present tense; it doesn't fit the timeframe of the sentence. Before you continue, review the rules for irregular verbs.

Go back to the sentence to try again.

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