APAD：One good turn deserves……
One good turn deserves another
means that when someone does a favor for you, you should do a favor for them in repayment; kindness should be rewarded with kindness. The proverb one good turn deserves anotherhas been in use since the 1400s and may be found in John Heywood’s A dialogue conteinyng the nomber of all the proverbes in the englishe tongue published in 1546 as: “One good turn asketh another.” The sentiment behind one good turn deserves another is credited to Aesop, a Greek storyteller who lived in the 500s B.C. His story, The Serpent and the Eagle, tells the tale of a farmer who witnessed a life-and-death struggle between a serpent and an eagle. The farmer freed the eagle from the serpent, but as the serpent departed, he spat venom into the farmer’s drinking flask. The farmer didn’t notice, and began to take a drink from his flask, but the eagle knocked the flask from the farmer’s hands to save him from being poisoned. The moral of Aesop’s fable is: One good turn deserves another.
Phrasal verb：
Drop out — To quit or stop participating in something
Type: Separable, intransitive
She was a straight-A student, but she dropped out of college to pursue her dream of becoming an artist.