WHEN THE FRONT DOOR BELL RANG, MY SISTER WAS ... OF MAKING A CAKE....
15. When the front door bell rang, my sister was ... of making a cake.
a. at the center
b. on her way
c. halfway through
d. in the middle
--> d
15. When the front door bell rang, my sister was ... of making a cake.
a. at the center
b. on her way
c. halfway through
d. in the middle
--> d