It’s now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980, when smallpox was eradicated in the wild, by destroying the killer virus in the last two labs that are supposed to have it — one in the US and one in Russia. If smallpox had truly gone from the planet, what point was there in keeping these reserves
(1) reality, of course, it was naive to (2) that everyone would let (3) of such a potent potential weapon. Undoubtedly several nations still have (4) vials. (5) the last "official" stocks of live virus bred mistrust of the US and Russia (6) no obvious gain.
Now American researchers have (7) an animal model of the human disease, opening the (8) for tests on new treatments and vaccines. So once again t
A. keep
B. put
C. destroy
D. eradicate
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