raffic slowed down because of theheavy snow in Yushu county, presenting a new __________ to the recovery fromthe earthquake.

Mr.Bush is on time for everything.How ________ it be that he was late for the opening ceremony.

Alice, have you heard that the grocery store down the street was ____, and nearly all the things there were stolen? — God! Really? That’s horrible!

This is ____ desk.

I try to ______ a few minutes every day to do someexercises.