It was not until I came here ________ I realized this place was famous for not only its beauty but also its weather.(2012·湖南)
Your son came to my class every day, but his attitude _____ he was not really interested at all.
It' s a pity that there are many teenagers _____only on-line activity is chatting with their e -pals !
- Do you mind my opening the window? -______I feel a bit cold.
Father said he would come to my graduation ceremony, he didn't, _______.
Be _____we can' t expect an absolute freedom of expression.