In order to _________ a good learning atmosphere, our teacher made strict rules for us at the beginning of this term.
beautiful T-shirt you’re wearing !
---I have been to Changsha . --- . I think it's nice .
---Can you think of any_______tips to protect yourselves against crime? ---I have no idea.
Nobody has the right to laugh at others _________ he is right.
Look, there is “u” and “s” in the word university .