1) The _____ was named man's best friend. a) horse b) bull c) dog d) cat 2) The _____ is a cleaning tool widely used in many places. a) broom b) truck c) tree d) radio 3) The spider is an _____. a) reptile b) arthropod c) amphibian d) mollusk 4) The _____ is the organ that processes information. a) liver b) heart c) kidney d) brain 5) _____ is the most widely spoken language in the world. a) French b) English c) Russian d) Spanish

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