单项选择题
A．PROLONG
B．PROTRACT
C．EXTENSION
D．EXPANSION
单项选择题 （）WE WOULD LIKE TO CLOSE THE BUSINESS WITH YOU,WE FIND YOUR BID UNACCEPTABLE.
单项选择题 .THE IMPORTANCE OF DELIVERY ON TIME（）OVERSTRESSED,BECAUSE FAILURE TO RECRIVE GOODS OR SERVICES WILL CAUSE SERIOUS INCONVENIENCE TO THE END-USERS.
单项选择题 WE（）TO ALLOW YOU A SPECIAL DISCOUNT IF YOU INCREASE YOUR ORDER TO 5000 PAINS.