Answer :
a.I'm not satisfied with your explanation of where you were last night.
b.I came into the room when Mary was playing the piano.
c.no error!!!
d.There are some sheep in the field.
e.Playing the drums and singing is difficult.
b.I came into the room when Mary was playing the piano.
c.no error!!!
d.There are some sheep in the field.
e.Playing the drums and singing is difficult.