37 The company is in discussions with several countries to _______ a trial for the potential vaccine.
(A) conceal
(B) conduct
(C) confront
(D) condemn

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統計: A(19), B(93), C(12), D(11), E(0) #2940301

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該公司正在與幾個國家討論可能執行的疫苗試...
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The company is in di...
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