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
( )邀请 ( )封人

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