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  3. 下面的短文有15处空白，请根据短文内容为每处空白确定 1 个最佳选项。 One Good Reason to Let Smallpox Live ...

下面的短文有15处空白，请根据短文内容为每处空白确定 1 个最佳选项。 One Good Reason to Let Smallpox Live ...

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问题 下面的短文有15处空白，请根据短文内容为每处空白确定 1 个最佳选项。
One Good Reason to Let Smallpox Live
It’s now a fair bet that we will never see the total extinction （灭绝）of the smallpox （天花） virus. When smallpox was completely got rid of in the world，scientists wanted to ___  (1) the killer virus in the last two labs — one in the U. S. and one in Russia.
They asked : If smallpox has truly gone from the planet, ____________ (2) point was there in keeping these reserves?
In reality, of course, it was naive to ____________ (3) that everyone would let go of such a powerful potential weapon. Undoubtedly several nations still have __________ (4) vials （小药瓶）. And the last “ official” stocks of live virus bred mistrust of the U. S. and Russia, ____________ (5) no obvious gain.
Now American researchers have ____________ (6) an animal model of the human disease, opening the (7) for tests on new treatments and vaccines （疫苗）. So once again there’s a good reason to ____________ (8) the virus — just in ____________(9) the disease puts in reappearance.
How do we ____________ (10) with the mistrust of the U. S. and Russia? _____________(11). Keep the virus ____________ (12) international support in a well-guarded UN laboratory that’s open to all countries. The U. S. will object, of course, just as it ___________ (13) a multilateral （多边的） approach to just about everything. But it doesn’t mean the idea is ____________ (14). If the virus is useful, then let’s ____________ (15) it the servant of all humanity — not just a part of it.

（2）
选项 A which
B that
C this
D what
答案D
解析
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