Mr. Smith is always on time for everything. How ________ it be that he was late for the flight?
New technologies have made __________ possible to turn out new products faster and at a lower cost.
The new bridge __________ by the famous architect is __________ now.
Without enough sleep, I just cannot __________ an original thought no matter how hard I try.
Students must have access __________ a good library.
E-mail, as well as telephones, __________ an important role in daily communication.