Pop music is ____ an important part of society____ it has even influenced our language.

To be an astronaut, you must not only be strong in mind, but also be sound mentally and___.

He began to take English _______ only when he left school.

The death toll of the quake in New Zealand is _____ 150, but officials say the figure won’t stand because they are still getting information in．

I sincerely regret that I have hurt your feelings, but I didn’t do it ______.