In the first paragraph the author tells us that the infections of HIV/AIDS 1)______ rapidly in the first half of 2001 compared with the same period of the previous year. 2) ______ is the leading reason for the spread of AIDS in China, and then the 3) ______ blood donors. Officials from UNAIDS said China still has time to act if it wants to 1) ______ a widespread epidemic before the end of the decade, such as the education of those who work in 2) ______, the installation of 3) ______ machines and more open discussions in 4) ______, etc. But at present the most frustrating problem facing China is that it has not developed any 5) ______ medicines itself. Foreign AIDS drugs can cost 6) ______ a year, well beyond the means of most Chinese. A leading American AIDS researcher cautioned that 1) ______ awareness, 2) ______ statistics and participation of the 3) ______ sector are critical for HIV / AIDS prevention and control in China.