40. indifferent to ~ = ~¿¡ ¹«°ü½ÉÇÑ
(X) They're indifferent for politics.
(O) They're indifferent to politics.
41. insist on ~ = ~À» (°·ÂÈ÷) °íÁý[¿ä±¸/ÁÖÀå]ÇÏ´Ù
(X) He always insisted to his opinion.
(O) He always insisted on his opinion.
Note: Persist takes in. He persisted in his silly ideas.
42. interested in ~ = ~¿¡ °ü½ÉÀÖ´Â
(X) She's not interested for her work.
(O) She's not interested in her work.
Note: Also take an interest in. She takes a great interest in music.