单项选择题

All the staff members of the department made______ efforts to clean up the hall for the Christmas party.

A．gigantic
B．concerted
C．comprehensive
D．conscientious
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单项选择题
The dean of our department asked that all the students______ at the reception this afternoon in order to meet the representatives form other colleges.
A．are present
B．will be present
C．would be present
D．be present
单项选择题
This book is a______ of radio scripts, in which we seek to explain how the words and expression become part of our language.
A．collection
B．publication
C．volume
D．stack
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