阿摩線上測驗
75. In recent years, there has been an increase in
environmental disasters, and scientists are unsure _____.
(A) what contributes to them it is
(B) what is contributing to them
(C)what the contributions to them is
(D) who contributes to them it is
答案：登入後查看
統計： A(10), B(52), C(38), D(1), E(0) #3254256
統計： A(10), B(52), C(38), D(1), E(0) #3254256
詳解 (共 2 筆)
M
#6371958
In recent years, there has been an increase in environmental disasters, and scientists are unsure what is contributing to them.
近年來，環境災難不斷增多，科學家並不確定造成這些災難的原因。
近年來，環境災難不斷增多，科學家並不確定造成這些災難的原因。
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