17. Today, nearly half of the world's population is at risk from malaria. It kills more than 400,000
people a year, most of them in Africa. But even cooler places, such Britain, have not always been_______
(A) spared
(B) blocked
(C) hindered
(D)revealed
(E)circulated
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統計: A(43), B(10), C(7), D(3), E(1) #2911585
統計: A(43), B(10), C(7), D(3), E(1) #2911585