Last night, we attended a concert ______ music by Haydn and Mozart, which was a feast for the ears.
Your niece is very strict and ______ worth teaching, but your nephew is not. Look, he is now ______ asleep in class.
Our school has used computers in teaching for ten years. As a result, not only______, but students become more interested in their lessons.
I arrived home at midnight, _______ my parents had been waiting for nearly three hours.
--- It’s wrong of a student to follow ______ his teacher says. --- It’s true. I can’t agree ______.
The teacher set such a difficult problem ________none of us could solve.