题目内容

What _______ public is concerned about is whether medical workers and scientists will be able to find _______ cure for this new disease after the vaccine(疫苗) is tried on  volunteers.?
A./;/;/B.the;the;/?
C.the;/;theD.the;a;the?
D?
public前加定冠词表示“公众”;第二空表示“一种治疗的办法或药物”,cure是单数可数名词,要加a;第三空的“志愿者” 指接受疫苗试验的志愿者,表特指要加the。
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