---You are always full of ______. Can you tell me the secret?---Taking plenty of exercise every day.

 This information allows businessmen to keep        of their list of goods by showing which items are being sold and how fast they are moving.

—What do you think of the story in today's newspaper?—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.

Every year, ____ graduates take pan in TOEFL for further education abroad.

—Which module is the most difficult in this book?— I think _____ module.