He is_______to have come back from the abroad.

I can’t thank you too much for your kindness because without your help I        have won the first prize in the speech contest．

–So far _______________. -- That’s too bad.

Maybe you have been too many famous restaurants, but nowhere else _______ such spicy ducks.

Though we found _____difficult to avoid economic and financial crisis, we must take measures to reduce its negative impact.