A. mysterious B. couple C. clerk D. mathematical A. moor B. cube C. too D. stupid A. clear B. function C. base D. magic A. acid rain B. solid C. memorial D. tail A. USA B. stick C. consist of D. marry A. byproduct B. emperor C. lizard D. forty-four A. stepmother B. gasp C. relay race D. robot-arm A. moreover B. minibus C. excite D. fallen A. dislocate B. weak C. neither nor D. dodo A. inclination B. scene C. button D. opposed