问题：

[填空题]Reasons for the increasing use of counter trade include: firstly, the world debt 1has made ordinary trade financing very 2Many countries cannot 3 the trade credit or financial4 to pay for desired imports Secondly, countries are increasingly returning to the notion of bilateralism as a way to reduce trade 5 Thirdly, counter trade is often viewed 6an excellent mechanism to gain entry 7new markets The party receiving the goods may become a new 8, opening up new international marketing channels and ultimately9 the market And lastly,10 counter trade services helps sellers differentiate its products from those of competitors