------ Who is that man over there? _______ it be our teacher?------ No, it _______ not be our teacher. It _______ be Mr. Zhang.
David asked his nephew to ______ his bag while he headed for a drink at the airport.
The reason why I was late was that I was ______ by the traffic jam.
One valuable tip for graduates is that first impressions during a job interview really ______.
The general manager thought _______ of these problems before he made the final decision.
Many of the big world sports events are _______by wealthy big companies, who hope to advertise their companies or their products.