It's ashamed of him to have got so much help from others but

It's ashamed of him to have got so much help from others but It's r____ kind of you to give me so much help. It's very n____ of you to give me so much help I llike the party so much ,but i have to go home.it's too la it's kind of you to have given us much help. It's so cool to have a friend like him. It's very k__ of him to say so. It's very clever of him to say so. It's a bit strong of him to do so. 1 I would have been able to help him,but I---so busy. 不定词.It's stupid of him to speak ill of others It,s stupid of him to speak ill of others.哪个是主词?