Zespri is risking millions of dollars on the launch of an entirely new product, the bald, gold kiwifruit. The effort, Zespri says, has been a great success. But with Zespri Gold making up only 10 percent of total New Zealand kiwifruit production, the company must be careful to continue to promote the traditional hairy green variety, which has annual sales of NZ$500m and is New Zealand’s single most important fruit export.

In Japan Zespri managers decided to emphasise the fruit’s health-giving, energy enhancing qualities. The new variety is sweeter and more attractive to Asian tastes. Yu Jan Chen, regional manager for Zespri in Japan and Asia says: ‘It is ideal for the Asian markets.’ He says it is selling very well in Japan, and is also being marketed in South Korea and Taiwan. The export season began slowly because the traditional green fruit was unusually small and difficult to sell. However, sales picked up when the gold fruit became available.

The successful launch of the gold fruit is expected to increase profits in the long term. The Kiwifruit Marketing Board has retained all marketing and selling rights for Europe and overseas for the trademark variety. This will protect revenue as the gold variety will be planted worldwide.

The board has already signed contracts with the four largest kiwifruit cooperatives in Italy, and planting has begun. The area for planting is expected to grow steadily, eventually producing millions of trays.

As Guus Van Der Kleij, regional manager for Europe, says, ‘It is an excellent product: after 25 years selling traditional green kiwifruit, you don’t know how exciting it is to sell something different.’

我的疑问是：

（1）第二段的 sell 为什么是用主动，而 market 却是被动？

（2）第三段最后一句的 as 是什么意思？

（3）第四段最后一句 producing 的逻辑主语是？millions of trays 是什么意思？

（4）after 25 years selling......的意思是“在卖了传统绿奇异果后，你就不会知道……”还是“25年后来卖传统绿奇异果，你就不会知道……”？为什么不是用 won't know？