5. 答案：FALSE （见第6段第第1句：Only a small amount of the virus needs to get to the cancer.）

6. 答案：TRUE （见第7段：Preliminary research on mice shows that the viruses work well on tumours resistant to standard cancer drug. ……, which could be quite different to anything we've had before." ）

7. 答案：B (见第8段第1、2句：Researchers have known for some time that viruses can kill tumour cells and some aspects of the work have already been published in scientific journals. Journal意思是“日报、期刊、杂志”)

8. 答案：D （见第9段第1句：Prof Seymour's innovative solution is to mask the virus from the body's immune system, …… “mask”的意思是“掩盖、隐蔽、伪装”， 在这里和 “disguise”同义。）

9. 答案：B （见第11段第2句： If they escape from the tumour, the copies will be quickly recognised and mopped up by the body's immune system.. “mop up”这里与 “wipe out” 同义，意思是“消灭、歼灭”。）

10．答案：disable （见第13段最后1句：For safety reasons, both will be disabled to make them less pathogenic in the trial, but Prof Seymour said he eventually hopes to use natural viruses. ）

11. 答案：natural ones （见第13段最后1句：For safety reasons, both will be disabled to make them less pathogenic in the trial, but Prof Seymour said he eventually hopes to use natural viruses. ）

12. 答案：dosage （见第14段第1句：The first trials will use uncoated adenovirus and vaccinia and will be delivered locally to liver tumours, in order to establish whether the treatment is safe in humans and what dose of virus will be needed.）

13. 答案：directed （见第14段最后1句：Though the approach will be examined at first for cancers that do not respond to conventional treatments, …）

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