---- “Don’t you believe me？” -------“______, I’ll believe _______ you say.”

 — I remember you lent me a book last week .—         ? I forgot .

-----Have you been wasting time on computer games again?----- _______. I’ve been studying a lot and I need a break.

--Spacecraft "Discovery" has failed in the course of launch.--_____? They have been preparing for the test.

—Shall we phone Mary and say sorry to her?—        It was our fault.