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