阿摩線上測驗
17. The biologist__________ very knowledgeable about botany, this difficult question did not baffle her.
(A) is
(B) was
(C) been
(D) being
答案：登入後查看
統計： A(23), B(38), C(6), D(13), E(0) #2450822
統計： A(23), B(38), C(6), D(13), E(0) #2450822
