Read the given sentences and fill in the blanks with the appropriate type of verbs mentioned in brackets.

My sister ____ ice cream.

The correct answer is: Likes

The correct answer is "Likes".
Here, the sentence informs us that the speaker loves ice cream. Since it is expressing a characteristic of the speaker, it comes under simple present tense. To form simple present tense, we must add s/es after the verb if it follows a third person singular number subject. As the subject, "She", is third person singular number, the correct answer is "Likes".