THEY WANTED TO KNOW WHY THEY ... IT FOR HER WHILE SHE COULD DO IT...
166. They wanted to know why they ... it for her while she could do it
by herself.
a. did
b. have done
c. should do
d. have to do
--> c
166. They wanted to know why they ... it for her while she could do it
by herself.
a. did
b. have done
c. should do
d. have to do
--> c