(.)overthecomputerallday,shefoundshewashavingbackproblems.
위문장에서빈칸에들어갈말이
(a)hunched
(b)tohunch
(c)hunches
(d)hadhunched

이중에답이있나요??

Aftershe(had)hunched를분사로만들면Havinghunched가답이라샡각하는데요.원래문장에서had를뺀다고쳐도Hunching이들어가야지어떻게-ed형태의분사가쓰이나요??Hunch가자동사로쓰인거니까앞에being이생략된거라보기힘들지않나요...???