题干
.
—__________ Mr．White was appointed director of our department.
—Then we have two Whites now including ___________ Mr．White, the doorkeeper.
—__________ Mr．White was appointed director of our department.
—Then we have two Whites now including ___________ Mr．White, the doorkeeper.
A：The; a
B：A; the
C：A; 不填
D：不填; a
答案(点此获取答案解析）
C
的单调递增区间是 （ ）