Definition: a feeling of worry Level: C2
他十六岁，无忧无虑。
He was sixteen years old and didn't have a ___care in the world.
那一刻，她感到自由，毫无牵挂。
At that moment, she felt free and didn't have a ___care in the world.
尽管责任重重，他似乎总有心事。
With all his responsibilities, he always seems to have a ___care on his mind.
