She considered（ ）important that everything should be finished by ten.
It worried her a bit（）her hair was turning gray.
It will come out（ ）she has donated quite a lot of money to cancer research.
（ ）is not easy to find a good friend in a new place.
We have to wait for the bus,（ ）?
Mary used to get up late,（ ）?
“You cannot answer this question?” “（）. I know very little about the subject.”
Everyone warned you,（ ）?
-“You haven’t been to the Niagara Falls?”
-“（ ）, I haven’t.”
He's worked there since the shop opened in 1998, （ ）?
He must have waited here for an hour, （）?
None of their new products have sold well, （）?