Fill in the blank: "He is good ___ mathematics."

Meaning of the idiom "Wear your heart on your sleeve":

Fill in the blank: "She apologized ___ her mistake."

Meaning of the idiom "Water under the bridge":

Fill in the blank: "The book is full ___ interesting facts."

Meaning of the idiom "Turn a blind eye":

Fill in the blank: "He arrived ___ the airport on time."

Meaning of the idiom "Throw in the towel":

Fill in the blank: "They divided the cake ___ four parts."

Meaning of the idiom "The ball is in your court":

Fill in the blank: "I am fond ___ music."