問題詳情

15. With the outbreak of H7N9, how to control this easily spreading disease has become a major _____ in mainland China.
(A) destruction
(B) bargain
(C) concern
(D) assistance
(E) attack 

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)