After walking in the Shanghai World Expo for a whole day, my legs ____ under me and I couldn’t walk any farther.
In my opinion, money is very important in a way, but it isn't ________.
________ is known to us all that the sun rises in the east.
When I met him the other day,it was the first time we ________ each other since we were at school.
Almost 50% of those ________ said that they supported the President's decision.
The traditional approach __________ with complex problems is to break them down into smaller,more easily managed problems.