M4-Synoyms and antonyms

Guess who I met today at the supermarket? (synonym)

She is driving me up the wall. She won't stop talking. (antonym)

We see each other once in a blue moon (antonym)

She came one hour beforehand. (synonym)

Stop pulling my leg! (antonym)

Those new shoes had cost an arm and a leg. (antonym)

John must be down in the dumps, because he frowns all the time (antonym?)

They had to call off the wedding because of the rain. (synonym)

I've got to reduce the amount of sweets I eat. (synonym)

You look terrible. You look like you're on your last legs. (synonym)

Would you be kind enough to fill in this application, please? (synonym)

It makes my blood boil when people don't tie up their dogs. (antonym)