A. helper B. lake C. clean the room D. let me see A. overnight B. professional C. river D. sweep up A. regulation B. district C. sky D. in cash A. basic B. pay C. definite D. mountain A. be known as B. cloud C. interval D. disorder A. tree B. format C. speedboat D. inhabitant A. sigh B. drill C. intensely D. hill A. Breathtaking B. insidious C. renew D. flower A. island B. separate from C. flaw D. set down A. the Olympics B. take pity on C. sea D. strong-minded