A. learned B. mental C. on D. due A. sleeper B. thousand C. big D. twenty-four A. a series of B. cubic C. sorghum D. pig A. Oxford B. lie C. hundreds of D. instruct A. boo B. watch C. lot D. sweeping A. nicotine B. greet C. be careful with D. No littering A. the Antarctic B. absence C. taxi D. anti A. combination B. daily life C. qualified D. lost and found box A. plane B. mushroom C. telegram D. engineering A. of course B. surprising C. lost and found office D. theater