6.The excellent reviews given to the TV play _______ its success.

A.led                                                                B.ensured

C.lost                                                               D.destroyed

7.The manufacturers won’t take the _______ for damage caused by misuse.

A.duty                                                              B.responsibility

C.reliability                                                       D.reputation

8.The boss was so impatient that the employees always answered his quesitons _______.

A.carelessly                                                      B.freely

C.bravely                                                          D.cautiously

9.Under the _______ she had to accept the job.

A.rules                                                             B.circumstances

C.occasion                                                       D.convention

10.The company _______ its customers a new catalogue every half year.

A.formulates                                                     B.requires

C.forwards                                                       D.dispatch

11.The goods must be packed according to the buyer’s _______ or the buyer won’t make the payment.

A.instructions                                                   B.order

C.inspiration                                                     D.construction

12.We have reduced the quantity _______800 _______400 kilos.

A.at, to                                                             B.from, to

C.with, and                                                       D.to, from

13.For the transaction, the exporter insisted _______payment by L/C.

A.for                                                                B.on

C.at                                                                 D.in

14._______what sum shall we open the letter of credit?

A.To                                                    &nbs p;           B.At

C.Under                                                           D.For

15.They must find new markets _______their commodities.

A.for                                                                B.with

C.of                                                                 D.through