单选题 A number of sales ___ gave presentations to introduce their latest product at the conference.

单选题 The manager demands that I meet five ______ at the exhibition tomorrow.

单选题 The foreign visitor said that the hosts ______ kind.

单选题 The desk clerk in the hotel gave me ______.

单选题 Hello, Robert Smith, it is ______ to see you.

单选题 The guest presented ______ that a staff in the hotel had stolen her pack.

单选题 There ______ means to contact those customers.

单选题 —Hello, sir. May I help you?
—Yes, I forgot both of the ______; one for me and the other for my assistant.