問題詳情
【題組】55. We learn from the text that volunteers in the experiment _____.
(A)were patients with bad coughs
(B)were divided into the three groups
(C)received standard treatments
(D)suffered little side effects
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)