Bob is the complete opposite of his sister. He is always making people angry or upset because he just doesn’t consider their feelings. - insensitive (черствый, неотзывчивый)
The other thing about Bob is that he really wants to get the supervisor’s job and then become boss for the whole department. - ambitious (амбициозный, честолюбивый)
He works 12 hours a day. - hard-working (трудолюбивый)
That boy does stupid things and doesn’t think what he is doing. - /He/ has no common sense (лишен здравомыслия)
His sister, on the other hand, has lots of common sense. - /She's/ sensible (благоразумная)
People often say the British do not show their feelings. - Reserved (чопорные, холодные)
She always feels sure of her abilities. - self-confident (уверенная в собственных силах)