was ________ by the salesman whose products turned out to be much less effective.

When was it________you let out the secret

He is always picking up very heavy things just to ________ his strength.— What a man![ ]

If__________, some terrible diseases would spread in the stricken-areas after the terrible earthquake in Wenchuan, Sichuan Province. —-So people there were in______ need of medical teams.

Children under sixteen are not permitted to participate in such kind ofactivities _____ bad for their mental development.