Although the police thought he was the most likely one, _____ they had no exact proof about it, they could not arrest him.
— ____ he be at home now ? — No . he ____ not . He ____ be in his office . He often goes home from work at almost twelve .
You had better not keep the window open , ____ ?
“That VCD you bought ____ very expensive” . “Do you know ____ ? ”
“I won''t go to school today , Dad ? ” “____ . ”
She must have seen the blind man many times , ____ she ?