1、What you think is proper in your own country may not be proper in another because of c_____________ difference.
2、They have decided to d______________ the evidence immediately they found there was no chance of breaking through.
3、An earthquake left the whole city in __________ (废墟)
4、On the exhibition , you can see many treasures found in an ancient s____________ ship
5、The electors d_______________ against the new rules and refused to sign their names on these documents.
6、We need to become a u____________ team to reach our long-term goals.
