A．Because she cannot find a husband for herself.
B．Because the female spider is larger than the male one.
C．Because the female spider often eats her husband.
D．Because she is a black female spider.

A．The children have gone to their grandmother’s after school.
B．The children’s grandmother lives a few blocks from the sea.
C．The children and their grandmother have gone to play at school.
D．The children will go to their grandmother’s after school today.