I’m afraid I’m not _____ to help with the show, for I am fully occupied with my own project.
____ I can see, there is only one possible way to keep away from danger.
Most students think this book is useful as it ____ all the basic grammar rules they need to know.
--- I apologize for not being able to join you for dinner. --- ______.
The jewels that the rich lady was wearing that evening must be ______.
When you go abroad for further study, you should learn to adapt to the ______ of the destination country.