She________the opportunity,but unfortunately she just let it go.
I'm sorry to bother you, ____ can you direct me to the railway station?
_______you need any help, please don't hesitate to let me know.
If I had known you were coming, I ______a larger table.
I passed by Joan quickly without greeting her, ______not to see her.
The inventor was determined to go on with the experiment_______countless failures.