"Who needs_____?"the doctor asked.A to operateB operatingC to being operatedD operating on

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"Whoneeds_____?"thedoctorasked.AtooperateBoperatingCtobeingoperatedDoperatingon"Whoneeds_____?"thedo

"Who needs_____?"the doctor asked.A to operateB operatingC to being operatedD operating on
"Who needs_____?"the doctor asked.
A to operate
B operating
C to being operated
D operating on

"Who needs_____?"the doctor asked.A to operateB operatingC to being operatedD operating on
B
need/want to be done=need/want doing

B

D
v-ing 的主动式表被动