It’s reported that the new underground line has been completed．—Yes but it hasn’t been made clear _____it’s to be opened to traffic

Not only his parents but also his brother _______ to the Great Wall. They haven’t been back.

_____on the MSN, some people often use ’88’ foe ‘good-bye’. [ ]

He is so careless that he always ______hisschool things at home

Why didn’t you tell me the fact earlier—I _____ it for granted ______ you knewit.