What does it mean when someone says, "to cost an arm and a leg"

Choose the most appropriate meaning/phrasal verb/word/verb for the sentence.

The teacher read the riot act to the noisy class.

He was ________ by the sudden news of his transfer and couldn't respond immediately.

The distance between the two villages is only 5 km ________, but the road journey is much longer.

The intern completely misunderstood the instructions and got ________.

Choose the most appropriate meaning/phrasal verb/word/verb for the sentence.

The new CEO threw down the gauntlet in the first board meeting.

Choose the most appropriate meaning/phrasal verb/word/verb for the sentence.

He still carries the torch for his high school crush.