How do you _______it and what should you ________it?

--What can I do for you,sir?
----I”d like to see the manager ________of sales department.

Tom kept silent about the accident _________ lose his job.

Iraq has ______ too many wars since 1990, making his people _______ a lot.

When the powerful earthquake struck and all lights went out all of a sudden. It seemed _______ the world was at an end.