Though the situation is rather serious, financial leaders are still ______ about global economy.

I wish you'd do ______ talking and some more work. Thus things will become better.

—What do you think of her performance?    —Wonderful．____heard a ____voice．

—Can you lend me the book Gone with the Wind? —Sorry. I returned it to the library just now. Maybe it is still ______.

The young pianist is very excited because the concert given by him has never been ____ .