选词填空，将方框中单词的合适形式填在横线上。（5分）

选词填空，将方框中单词的合适形式填在横线上。（5分）
小题1:Dogs are ___________( 诚实的 )friends of human beings.
小题2:I felt so happy because my father ____ _ ( 答应 ) to buy me a new cellphone.
小题3:Please tell me the____________（原因）why you are late.
小题4:Would you give me some bread? I am so ___________( 饥饿 ) .
小题5:Who can give this question a ________（正确的）answer?