Eating too much chocolate made my niece and nephew ______.

A．To defend its territories.
B．To attract the attention of other birds.
C．To warn other birds.
D．To pronounce that it has occupied the place.

A．He hopes to buy the computer after three months.
B．He has been saving for three months.
C．The computer was delivered earlier than he expected.
D．The computer he wants is not available.