Change into Passive voice .
"Did they cook vegetables ?"
A"Was vegetable cooked by them ?"
B"Was vegetables cooked by them ?"
C"Were vegetables cooked by them ?"
D"Were vegetable cooked by them?"
Change into Passive voice .
"Did they cook vegetables ?"
A"Was vegetable cooked by them ?"
B"Was vegetables cooked by them ?"
C"Were vegetables cooked by them ?"
D"Were vegetable cooked by them?"