高等教育 / 大学英语（四）
_ _ _ _ a teacher in our college, it is necessary to have at least a master's degree.
(A) To become
(B) One becomes
(C) Becoming of
(D) Who becomes
(A) To become
(B) One becomes
(C) Becoming of
(D) Who becomes
参考答案：
佳题速递：