He or she could tell you. what is the subject and predict

He or she= A compound subject

Could= Predict

Explanation:

A compound subject= two or more individual noun phrases coordinated to form a single, longer noun phrase.

Predict= to declare or indicate in advance especially. (Basically, any word that tells you that something has a possibility of happening.)

answer holy cow

explanation:

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.)