Shandong province; Wenzhou, Zhejiang province; Yan'an, Shaanxi province; Kashgar, in the Xinjiang Uygur autonomous region; and Daqing, Heilongjiang province. The sites represent actually every type of saline-alkali land in China and researchers aim to cultivate different strains able to cope with different climate, salinity and soil structure conditions.

　　The test crops in Kashgar and Daqing were also harvested on Wednesday. In Kashgar, the yield reached more than 7.5 tons per hectare, according to experts' tests, much higher than expected. The harvest in Kashgar was satisfactory. The result means it is possible to plant such salt-resistant rice in southern Xinjiang in the future. Xinjiang has about 2 million hectares of saline-alkali land that have the potential to be planted with salt-resistant rice, and if it is widely planted, it will substantially improve rice production in the region.

　　The seawater rice strain grown in Daqing only yielded 3.1 tons per hectare. A live video clip on Shandong TV showed growers appearing a little disappointed by the result, as they hoped the experts' efforts would boost production. The water and soil conditions at the site were not ideal, and the pH level was extremely high.

　　28. Which is the main feature of seawater rice according to the text?

　　A. It has a shorter growing period.

　　B. It is a kind of highly productive crop.

　　C. It can grow in the soil with high salt content.

　　D. It is the combination of many technologies.

　　29. How much rice does a farmer harvest at least to meet the cost?

　　A. 3.9 tons a hectare. B. 4.5 tons a hectare.

　　C. 6.75 tons a hectare. D. 7. 5 tons a hectare.

　　30. The researchers chose the experimental fields according to

　　A. the distance between them.

　　B. the type of the soil and climate.

　　C. the local governments' support.

　　D. the local agricultural conditions.

　　31.What can we infer about the seawater rice from the last paragraph?

　　A. The seawater rice is not fit for all kinds of saline-alkali soils.

　　B. It is impossible for the seawater rice to have a good harvest.

　　C. Growers from Shandong were a little disappointed by the result.

　　D. The output of the seawater rice grown in Daqing is the lowest.

　　32. What is the text mainly about?

　　A. The research on the seawater rice.

　　B. The new development of the seawater rice.

　　C. The final result of the rice grown by crossbreeding.

　　D. The new contribution of Yuan Longping.

　　D

　　Cambodia attracted 1.44 million Chinese visitors during the first nine months of 2018, up 71.2 percent over the same period last year, said a Cambodian Tourism Ministry's report released on Tuesday.

China is the biggest source of foreign tourists to Cambodia, accounting for 28