——Tomorrow ____ my birthday. I’d like you and Jane to come.——I’m not sure if she ____ free.
Antarctic __________ we know very little is covered withthick ice all the year round.
The train __________ she was travelling was late.
—Howdo you like the book? —It's quite different from __________ I read last month.
Is this the museum __________ you visited the other day?
I refuse to accept the blame for something __________ was someone else's fault.