(37秒到1分20秒)Now, part of the reason for this is that we've invested a huge amount in nuclear deterrents. But we've actually invested very little____________. We're not ready for the next epidemic.
A.
in developing vaccines
B.
surveillance
C.
medical treatment
D.
in a system to stop an epidemic
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【单选题】The speaker thinks the driving test is a terrible experience ______
A.
because the government officers are hard to please
B.
because the learner has to go through several tough tests
C.
because the learner usually fails several times before he passes it
【单选题】It is often difficult for a man to be quite sure what tax he ought to pay to the government because it depends on so many different things: whether the man is married how many children he has whether ...