[ Past Modals ]
“What about someone with a key? A member of staff, perhaps?”
“It ___ have been one of the staff as I’m the only person with a key.”
A. must
B. can’t

Random Topics:
Who vs WhomParticipal PhrasesClauses and ConjunctionSentence Fragments and Complete SentencesWill vs be going toand, so, but, becauseSimple Present and Present Continuous TenseHave to/Has toParallelism and Subject Verb AgreementSo....that... Such.......thatOther quiz:
Tenses and Articles › ViewMr. Kyle is the new ……..of our company.
A. Executive director
B. Thirsty
C. Take
Proverbs › View
Which word is missing?
__________ is thicker than water.
A. Oil
B. Milk
C. Blood
D. Tea
Vocabulary › ViewHe gave no hint that he was in pain.
A. purpose
B. clue
C. target
D. affair
E. wage
Modal Verbs of Certainty and Possibility › View
It ______ very easy for him to tell her.
A. couldn’t have been
B. mustn’t have been
