Several _____ have been proposed to explain the sudden decline in the bee population., A. hypothesises, B. hypotheses, C. hypothesis, D. hypothes, The museum contains an extensive collection of ancient _____ from several Mediterranean civilizations., A. artifact, B. artifactes, C. artifacts, D. artifact's, Two _____ were assigned to monitor the entrance to the research facility., A. security guards, B. security guard, C. securities guard, D. security guardes, Scientists have identified more than eighty _____ of whales and dolphins., A. specie, B. specieses, C. specie's, D. species, The researcher observed several _____ feeding near the edge of the forest., A. deers, B. deer, C. deeres, D. deer's, Many _____ have difficulty adapting to rapidly changing environmental conditions., A. organism, B. organism's, C. organisms, D. organismies, The excavation revealed several human _____ beneath the ancient structure., A. teeth, B. tooth, C. tooths, D. toothes, The laboratory employs several _____ who specialize in molecular biology., A. scientist, B. scientist's, C. scientistes, D. scientists, The hurricane destroyed dozens of _____ along the eastern coastline., A. house, B. houses, C. housies, D. house's, The experiment was repeated three _____ before the researchers accepted the results., A. time, B. time's, C. times, D. timees, Several _____ were presented during the international conference on climate change., A. analyses, B. analysis, C. analysises, D. analysies, The human body contains approximately 206 _____., A. bone, B. bone's, C. boneses, D. bones, The researchers interviewed several _____ who had witnessed the volcanic eruption., A. person, B. people, C. personses, D. peopleses, Two _____ of the original manuscript are preserved in the university library., A. copy, B. copys, C. copies, D. copyes, The farmer discovered several _____ eating grain inside the storage building., A. mice, B. mouse, C. mouses, D. mices, Many _____ of tropical plants depend on insects for pollination., A. specie, B. specieses, C. specie's, D. species, The archaeological team uncovered several stone _____ near the entrance to the cave., A. tool, B. tools, C. tooles, D. tool's, Three _____ were used to analyze the chemical composition of the samples., A. microscope, B. microscope's, C. microscopes, D. microscopies, The report describes several economic _____ that may affect future employment., A. crises, B. crisis, C. crisises, D. crisies, The scientists examined the _____ of several large animals discovered at the site., A. foot, B. foots, C. feets, D. feet

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