A. authentic B. paper C. kilometre D. sprout A. opponent B. lab C. ought D. wait for A. pass on B. mostly C. chart D. spare time A. class B. on business C. discovery D. the next day A. century B. harbor C. lower D. ballast A. applause B. tank C. pretty D. up-to-date A. aesthetic B. No eating or drinking C. soil D. cupboard A. train B. equipment C. success D. bank A. overweight B. energize C. honk D. anyone A. chew B. know C. above all D. fingernail