答案：C

本题考查动词和强调句型。表示“使某人做某事”可用make sb do sth 或cause/get/lead sb to do sth.

答语部分是个省略句， 补充完整后是_____was her laziness and unkindness____ cause/get/lead me to get bored with her由此可知此句是强调句型，所以用it。