When lady guenevere stepped from the carriage, all were astonished because she was wearing a king’s ransom in jewelry. use context to decipher the meaning of the idiom.

For one..

Idiom means; a group of words established by usage as having a meaning not deducible from those of the individual words.

For two; what are the answer choices?

For three; I will answer it when I get more detail.

                                                                     -Promise.-

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.)