Answer: The correct answer is "Yo le<u> di </u>un lápiz a mi amigo".
Explanation: The verb in the sentence provided that has been conjugated in the present tense is "doy". T<u>he preterite form of the verb "doy" is "di" because "dar" (the infinitive form of this verb) is irregular</u>. In that way, <u>as the preterite form of most irregular verbs in Spanish ends in "i"</u>, such as "vi", <u>the form that fills in the answer blank is "di". </u>