20. We are aware that, _______, the situation will get worse.
(A) if not carefully dealt with
(B) if not dealing with care
(C) if not carefully deal with
(D) if not carefully dealing with
答案:登入後查看
統計: A(33), B(6), C(53), D(30), E(0) #1835862
統計: A(33), B(6), C(53), D(30), E(0) #1835862