A. contribution B. head C. fifteen D. dustbin A. beauty B. role model C. student D. observatory A. Be careful B. pretty good C. one D. outer space A. lung B. vertical C. seventeen D. birdwatching A. supernatural B. means C. workday D. eight A. bring B. four C. obey D. first prize A. tiger B. borough C. six D. What a shame A. stay in touch with B. settle C. efficiency D. fourteen A. hear from B. sweat C. on the whole D. stand A. function B. believable C. emergency D. sit down