This question tests knowledge of irregular verbs in English. Many verbs do not form their past tense by simply adding "-ed". The verb "buy" is one such irregular verb.
Correct Option: C) bought
The task is to choose the correct verb form to complete the sentence "We ____ the answer correctly." The sentence implies a completed action in the past, which requires a simple past tense verb.
Correct Option: B) guessed
To identify an irregular verb, we need to understand the difference between regular and irregular verbs. Regular verbs form their past tense and past participle by adding -ed or -d to the base form. Irregular verbs, on the other hand, do not follow this rule and often change their spelling in the past tense and past participle forms.
Correct Option: D) ate
The key to solving this fill-in-the-blank question is to identify the tense required by the sentence. The phrase "last year" clearly indicates that the action happened in the past, thus requiring a past tense verb.
Correct Option: B) passed
The sentence contains the time marker "two years ago," which indicates that the action happened in the past and is completed. Therefore, the verb form used must be in the simple past tense.
Correct Option: A) bought
An irregular verb is one that does not follow the typical pattern of adding "-ed" to form its past simple and past participle forms. Regular verbs, on the other hand, form their past simple and past participle by adding "-ed" or "-d" to the base form.
C) read β The verb "read" is irregular because its past simple and past participle forms are "read" (pronounced /rΙd/), which do not end in "-ed".