Is, went to the lake a sentence or fragment?

Fragment

Explanation:

A sentence has a subject and a verb.

A fragment doesn't have a subject or a verb.

This phrase has a verb: went

In this phrase, the lake is not the subject, it is the object.

Since it doesn't have a subject, it is a fragment.

well basically since ima beginner people will answer any subject "right away"and if you get more points you could ask more questions or if you answer someone's question you get points

a. "to practice" is the best phrase to complete the sentence.

explanation:

during the summer, she likes to practice her soccer skills so that she is ready to play in the fall.

(note that : all the other options "the practicing of", "practice for" and "to do a practice on" are inappropriate as they make the sentence grammatically incorrect.)