He is_______to have come back from the abroad.

 —Is there anything else I can get for you except the book? — No. That _____ be it. Thanks a lot.

The president, as well as his bodyguards, _______ to the nuclear station(核电站), _______ there was an accident 20 minutes ago.

The _____, I think, he drew from his simple experiment is not scientific.

“_____ when does the pub stay open？”  “About midnight.”