---- The reading room ______ from 9a.m. to 5p.m. ---- It’s 4 p.m. now, but the door ______.
They still go on working, ________ they feel tired.
— Can you come to my birthday party? —________.
The American singer wants to have ________.
What’s the matter ________ you?
I should go to see a dentist because I ________.