A. vase B. bonus C. since D. bison A. Great Wall B. immune C. while D. grandson A. finger B. surgery C. scorpion D. at that moment A. tool B. government C. export D. waste A. lend B. let's C. servant D. fallen A. sociologist B. rhythmic C. sewing machine D. snack A. borrow B. return C. by oneself D. employee A. mystery B. hate C. Springfield College D. dramatic A. best-known B. yay C. depend on D. off A. anyway B. incident C. lesson D. air