... mystery C. volcanic D. consider7. A. receipt B. profit C. language D. commerce 8. A. economy B. encouragement C. dependent D. mausoleum9. A. federate B. impressive C. designer D. location10. ... hurry / so / sit / down / under / tree / and / have / snack/.A. Everyone feel hungry, so he sits down under a tree and has snack.B. Everyone felt hungry, so we sat down under a tree and had a snack.C. ... impressive C. designer D. location10. A. affect B. replacementC. humorous D. descriptionIII. There is a mistake in the four underlined parts of each sentence. Find the mistakes (A, B, C or D)11. Lam...