My cellphonehas disappeared.Who ________ have taken it away?[ ]

She’s _____________ girl.

The committee ______ five famous scientistsput forward a valuable plan at the end of conference.

He fed little sheep on the farm, — , he was good at his work.

Which one of these two dictionaries do you advise me to buy, Oxford or Longman?—Well, take Oxford. I think it is the ________ of the two.