The whole world is undergoing the biggest financial crisis nowadays, ____ calls for international cooperation among all nations to get over.

I don’t think he could have done such a stupid thing last night, _____?

The price of the house is too ______. I am afraid I can’t afford it.

What has your hobby brought you?— I think it has brought me happiness, especially it keeps me _____ .

you your dictionary?—No. So I have to buy a new one today.