19. He made another wonderful discovery, of great importance to science.(A)which I think is (B)which

問題詳情

19. He made another wonderful discovery, of great importance to science.
(A)which I think is
(B)which I think it is
(C)which I think it
(D)I think is

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