【简答题】失业率是指()A. 失业人口占劳动人口的百分比 B.失业人数占人口总数的百分比 B. 消灭了自然事业的原因 D.以上均正确
【单选题】What does the man do?
B.
He's a college teacher.
C.
He's studying for a doctor's degree.
【单选题】. Frankly speaking, it’s people’s ________ to keep their promise that really annoys me.