分红保单红利主要来源于（）
A、死差益
B、利差益
C、费差益
D、其他收益
参考答案：A, B, C
室外排水管道接口的主要质量通病为（）。
A、管口渗水
B、管口漏水
C、管口渗漏水
D、管道变形
—Could you please tell me _______?
—Let me see. In twenty minutes [ ]
A. how often you go to your uncle's house
B. when are you leaving for Beijing
C. how soon the meeting will begin
D. how long it takes from your home to school
