b)My father always read a newspaper, but now he IS READING a magazine.(указатель present cont. - now)
с)Look at Karim. What IS SHE DOING? (т.к. акцент на внимание: посмотри на Карин.. и т.п.)
d)Every day Alina DRINKS apple juice. (повтор. действие+указатель present simple - every)
c)At the moment Talgat and Azat ARE DOING their homework together. (указатель present cont. - at the moment)