After the fall of the Qing Empire, some towns near the west part of the Great Wall ________ and the Wall itself _______.

o is being held in Shanghai, _______a lot of advanced technology is shownfor the first time

. peoplein the world are suffering from the H1N1 flu.

___________in the regulations that one should not tell other people the password of your email account.[ ]

If you want to do the experiment again, you’d better be more careful _____ you made a mistake. [ ]