Please help me to solve this question
There is an error in each of the lines. Write the incorrect word and the correction

2. The naturalist had been venturing into the jungles since       (a)_______________________
the long time, warnings from colleagues notwithstanding.         (b)_______________________
But he ensured that his team would abide in his                        (c)_______________________
regulations strictly, lest they will land themselves in                   (d)_______________________
hazardous situations. Many a times his jungle                           (e)_______________________
sense, which was superior than that of his                                 (f)_______________________
team members, proved its worthy by preventing                        (g)_______________________
disasters, so saving many lives.                                                 (h)_______________________