17. ____________ that green tea helps to prevent cancer.
(A) It is believed
(B) I am heard
(C) They are said
(D) Hearing
答案:登入後查看
統計: A(360), B(45), C(35), D(41), E(0) #1406333
統計: A(360), B(45), C(35), D(41), E(0) #1406333