36. It is imperative that he ________ the risks of the actions he is going to take.
(A) knew
(B) know
(C)knows
(D) knowing
答案:登入後查看
統計: A(26), B(108), C(158), D(15), E(0) #1560036
統計: A(26), B(108), C(158), D(15), E(0) #1560036