He was diagnosed with cancer last month, but he carried on with his work ______ nothing had happened

I think Maths is playing a more important partin the new test system. What about you—________. We should be more devoted to it.

Food prices are climbing around the world because farmers can’t ____ demand for grain．

Mencius believed that the reason why man is different from animals is______Man is good

There ________ so many playgrounds in this city 20 years ago.