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    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；/；the D. the；a；the?

    D?


    解析:

    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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