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（1分20秒-1分50秒）And as you look at what went on，the problem wasn'；t that there was a system that didn'；t work well enough，the problem was that（）.

（1分20秒-1分50秒）And as you look at what went on，the problem wasn'；t that there was a system that didn'；t work well enough，the problem was that（）.
A.We didn’t have a surveillance system
B.We didn’t have a control system
C.We didn'；t have a system at all.
D.We didn’t have a response system
正确答案：We didn'；t have a system at all.

标签：高级英语视听说与逻辑思辨

上一条：（37秒到1分20秒）Now， part of the reason for this is thatwe'；ve invested a huge amount in nuclear deterrents.But we'；ve actually invested very little（）.We'；re not ready for the next epidemic.

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（1分20秒-1分50秒）And as you look at what went on，the problem wasn&#39;；t that there was a system that didn&#39;；t work well enough，the problem was that（）.

（1分20秒-1分50秒）And as you look at what went on，the problem wasn'；t that there was a system that didn'；t work well enough，the problem was that（）.