A．Because they have all been shot.
B．Because they are too dangerous.
C．Because they are all hiding under the rivers.
D．Because the weather does not suit them nowadays.

A．To allow the necessary length of time for publicizing the wedding.
B．To provide the bride and groom with time to prepare for the wedding reception.
C．To make sure that the guests can arrange to attend the ceremony on the day.
D．To ensure a thorough investigation of the couple’s existing marital status.