---Could it be the restaurant_____ you had dinner with me yesterday ______ you left your keys?
The doctor warned Pat against smoking as soon as possible and _____.
–Jack is good at maths and doesn’t perform well in English.–_____.
It is these poisonous products _____ can cause the symptoms of the flu, such as headaches and aching muscles.
–Are you coming to Jeff’s party?–I’m not sure. I _____ go to the concert instead.
Sorry, I am late. I _____ have turned off the alarm clock and gone back to sleep again.