[ Dependent Preposition ]
The doctors had to operate ____ his knee after the injury.
A. on
B. at
C. in
D. for
Select your answer:

Random Topics:
Run-On SentencesCompound Words and SentencesAdjectives and AdverbsTransitive or Intransitive VerbsArticles & PrepositionObject PronounsNoun ClausesThe First Conditional (if/unless)Grammar Like & Linking VerbPresent Simple/AffirmativeOther quiz:
Grammar & Vocabulary › ViewThe thief opened the door and walked _______________ the room.
A. into
B. behind
C. across
D. through
Verb Tenses and Subordinates › View
I wish I __________ the truth earlier.
A. know
B. had known
C. knew
D. have known
