3. E. 分析：思路特点：段落中句子中的词语/结构语意。a lack of funding， rather than a lack of volunteers， cost more than 50 million Yuan (6 million dollars)这些结构的含义表明“缺少基金”，因此E是答案。
A Urgent need for both donors and funds (核心词)
C Desperate leukemia(白血病)patients(特征词)
F Comparison between mainland and Hong kong and Taiwan (特征词)
4. Paragraph 5. ____。
The Hong Kong Marrow Match Foundation said it has helped “a handful” of patients in Beijing， Shanghai and other cities. … But the cost of extracting bone marrow from one of the foundation’s 40，000 registered donors and flying it by courier has to be borne by the patients， and many of them have to be aided financially， Chin said.
4. A. 分析：思路特点：注意被选项中的核心词。判断A是答案：因为C中的“白血病”在段落中没有出现，因此C不是答案； F中的特征词“大陆，香港，台湾”在段落中没有出现，因此F不是答案。
A.about one percent of the total population
B.to be responsible for childhood leukemia
C.an urgent and tough task to be accomplished
D.less than one third of the minimum
E.an expensive cost to be paid
F. to afford the cost of bone marrow transportation
5. It seems that many of the recipients are not rich enough ___。
5. F 。 分析：enough 后应该跟不定式结构to do sth.。因此从语法角度上看B和F合适。从搭配语意(很多接受骨髓移植者不够富有不能支付骨髓移植的费用。)上F合适。
A.about one percent of the total population
B.to be responsible for childhood leukemia
C an urgent and tough task to be accomplished
D less than one third of the minimum
E an expensive cost to be paid
6. At present the number of bone marrow donors in mainland China is ____。
6. D.分析：利用“the number of bone marrow donors 和mainland”作为答案线索，这样发现答案相关句：(第3段)。。compared fewer than 30，000 donors among mainland China’s 1.3 billion people， the newspaper said. (第4段) China needs a pool of at least 100，000 donors but testing them would cost.。30，000/100，000 = 1/3， 因此判断D是答案。
A.about one percent of the total population
B.to be responsible for childhood leukemia
C an urgent and tough task to be accomplished
E an expensive cost to be paid
7. Some solvents and building materials are considered ____。
7. B.分析：consider 后通常跟to 或as ，因此判断B是答案。
A.about one percent of the total population
C an urgent and tough task to be accomplished
E an expensive cost to be paid
8. Obviously， recruiting voluntary bone marrow donors in mainland China is ___。
8. C.分析：根据搭配含义(很明显，中国的大陆招募骨髓移植自愿者是一项紧迫而艰巨的任务)判断C合适。