[ 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:
Vocabulary › Viewa brightly colored tropical bird that is often kept as a pet
A. ground
B. parrot
C. neighbor
D. panic
Grammar › View
Choose the correct question.
A. Where is Chunn last lesson?
B. Where Chunn last lesson?
C. Where was Chunn last lesson?
D. Where were Chunn last lesson?
E. Where did Chunn last lesson?
He 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
