She_______ thirty minutes_______ the piano every day.

下列各组词的字形和加线字的读音完全正确的一组是

Though he is busy, music has always been _______ his work

Of all the books on the shelf, is of any use for improving our practical skills of survival in the competitive world.

At present an increasing number of parents wish to _________ changes in educating their children due to dissatisfaction with the educational system.