卵巢囊肿蒂扭转的概述
参考答案：蒂扭转为常见的妇科急症。好发于瘤蒂长、中等大、活动度良好、重心偏于一侧的肿瘤，如畸胎瘤。
With a lot of difficult problems _ , the manager felt like a cat on hot bricks.
A．settled
B．settling
C．being settled
D．to settle
Is this the reason____ at the meeting for his carelessness in his work?
A．he explained
B．what he explained
C．how he explained
D．why he explained
