The correct form of the verb in the sentence "My granny _______ (to make) a lovely cake for my birthday a lot of times" is "has made".
The completed sentence is: "My granny has made a lovely cake for my birthday a lot of times."
Explanation:
* The sentence describes an action that has happened repeatedly in the past, so we should use the present perfect tense.
* The present perfect tense is formed with "have/has + past participle".
* Since "granny" is a singular subject, we use "has".
* The past participle of "make" is "made".
Translation into Russian: Моя бабушка много раз пекла вкусный торт на мой день рождения.