Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions. Question 1: He didn’t use to liked children, but it’s different now when he has his own. A. his own B. didn’t use C. liked D. but Question 2: The Son Doong cave was formed about 2 to 5 million years ago by river water eroding away the limestone underneath the mountain. A. million years B. eroding C. was formed D. The Son Doong Cave Question 3: This is the museum where has some of the best rock collections in the country. A. best rock B. where C. some of D. in the country