--- Hi, Tom. Any idea where Jane is? --- She ______ be in the classroom. I saw her there just now and she said she wouldn’t go anywhere.
Our teacher told us to ___________ the work ____________ we did just now.
Sally was ____________ to see her friend off at the airport.
As far as I’m concerned, education is about learning and the more you learn, ___________________.
Allen and I are in the same history class, but her assignment differs _____________ mine.
We must __________ that the experiment is controlled as rigidly as possible.