Mark the alternative that correctly fills in the blanks of the quote below according to the following indication: the present perfect of the verb TO BE¹ , the comparative form of the adjective STRONG² , the present perfect of the verb TO TEACH³ , and the comparative form of the adjective GOOD⁴ .
“Suffering _________ ¹_________ ² than all other teaching, and _________ ³ me to understand what your heart used to be. I have been bent and broken, but - I hope - into a _________ ⁴ shape.”
Charles Dickens