A. challenging B. telephone C. Macao D. swim A. mascot B. arduous C. student D. absorbing A. boy B. cleft C. artificial D. broad A. assessment B. teddy bear C. sit down D. slap A. week B. desk C. passive D. mariner A. nebula B. bag C. photographic D. statistics A. number B. theoretical C. eighty D. hotel A. a cup of B. along C. thirteen D. keen A. polluted B. eighteen C. byproduct D. regardless of A. fifteen B. landowner C. pitch D. Infallibility