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The reef attracts tourists.The reefs attract tourists.The thief will be caught.The thieves will be caught.1. The leaf has turned red.2. The fife had the solo.3. The calf is hungry.4. The scarf kept him warm .5. The knife will be useful.6. The giraffe was eating leaves.7. The cliff is being explored by geologists.B. The wolf howls every night.9. The loaf is rising.10. The chief will decide.11. The shelf is being used.12. The proof is convi ncing.Answers6. For each of the following sentences, change the subject of the verb to the plural,and change the verb so that it agrees with its subject. For example:The hero was enthusiastically welcomed.The heroes were enthusiastically welcomed.The studio is used by many artists.The studios are used by many artists.1. The radio is broadcasting news every hour.2. The tomato was being baked.3. The mosquito woke us up.4. The soprano performed with the orchestra.5. The solo was played by the violinist.6. The archipelago lies off the coast of South America.7. The silo is used for storing corn.B. The potato has been boiled.9. The volcano is not active.10. The casino was open until one o·clock in the morning.11. The innuendo should be ignored.12. The ratio has been favorable.Answers7. For each of the following sentences, change the subject of the verb to the plural,and change the verb so that it agrees with its subject. For example:The hypothesis is still tentative.The hypotheses are still tentative.The nebula has been studied by many scientists.The nebulae have been studied by many scientists.