2004年,在我国民政部门办理结婚和离婚手续的对数比约为()。
A. 4.6
B. 6.9
C. 8.3
D. 5.2
2005年,全国25-29岁居民办理结婚登记的有多少万对()。
A. 226.5
B. 282.3
C. 320.4
D. 346.8
______you call me to say you are not coming, I will see you at the theater.
A. If
B. Since
C. Although
D. Unless
______you are not busy, could you help me with this work?
A. Because
B. As long as
C. Although
D. In order that