A. Mercury B. amphibian C. concept D. Traveling A. contaminate B. pass away C. annoy D. rational A. trivial B. century C. sofa D. cave A. plenty B. sophistication C. cornflakes D. check A. variant B. join in C. earn one's living D. cook meals A. privately B. put up with C. nursery D. emission A. interstellar B. yourself C. thin D. important A. acquaintance B. flute C. megacycle D. biochemistry A. these B. rapids C. preliminary D. literally A. bruise B. stereotype C. intelligence D. greatly