A…………dealer B…………promising
C…………moderately D…………insurance
E…………freight F…………enclose
G…………illustrated H…………by separate post
I…………irrevocable L/C J…………place
K…………prompt shipment L…………invite
M…………standing credit N…………reference
O…………firm
( )定额贷款 ( )商人

A．why"Good Morning to All"was replaced by"Happy Birthday to You"
B．how the song"Happy Birthday to You"was composed
C．the history of the song"Happy Birthday to You"
D．why the song"Happy Birthday to You"is popular

A．longevity
B．a length of time
C．a long period of time
D．a long distance from one place to another