The last testimony gave (the judge) a reason to doubt the defendants version of the story

direct object
indirect object
predicate nominative
predicate adjective

im not to sure

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.)