A. surgery B. coin C. British D. yak A. everything B. neck C. craftsmanship D. trouble A. joke B. pants C. Houston Rockets D. Cincinnati A. medical B. favor C. invite D. prehistoric A. nothing B. proposition C. descend D. I'm afraid A. modern B. real C. later D. packing A. foundations B. slaughter C. anything D. do homework A. swallow B. hand in C. incompetent D. keep A. UFO B. mouth C. at least D. arduous A. underwater B. betray C. homestay D. dining room