------ Who is that man over there? _______ it be our teacher?------ No, it _______ not be our teacher. It _______ be Mr. Zhang.
It is most ________that the experts will come to the area to investigate the possible damage caused by the heavy flood.
_______ he was 12, Einstein had learned advanced mathematics by himself.
________is often the case, the weather has turned out well as expected.
As far as I see, ______ is no possibility ________ she will lend me a hand.
When the middle-aged man was visiting his girlfriend, she demanded that he _______ his beard.