The police are still unable to come to a (conclude)（）as to the cause of his death.

A．A guest and a receptionist.
B．A passenger and an air hostess.
C．A customer and a shop assistant.
D．A guest and a waitress.

A．She would buy a pen and a pencil.
B．She would buy nothing.
C．She would buy a hand ball set.
D．She would buy a chess set. Section C