多项选择题

TASK 4
Directions:The following is some signs for obligation.After reading them．you are required tofind the items equivalent to(与……等同)those given in Chinese in the table below．Then youshould put the corresponding letters in the brackets oil the Answer Sheet,numbered from 51 to55.
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