It is recommended that the project ________ not be started until all the preparations have been made.

 If you _____ smoke, please go outside.

It_____ have been Tom that parked the car here, as he is the only one with a car.

--- ______ I bring you all the magazines right now?--- No, you don’t have to, but you ______ give them to me tomorrow.

 John ______ leave for New York tomorrow, but I’m not sure.