Take another look at the sentence:
Theodore bought beautiful roses for Glenda, his date. Because he did not have a vase, he rinsed out a peanut butter jar. After Theodore __________ Glenda's reaction to the arrangement, he realized that he had not made a favorable first impression.
The sentence requires the past tense of see, an irregular verb. Saw is the simple past form.
|Verb||Simple Present||Simple Past||Past Participle|