A. climb B. compose C. sent D. in class A. thief B. way C. purity D. participate A. thumb B. e-book C. Rocky D. main course A. proportion B. topic C. planned D. reproduce A. direction B. heavy C. exclusively D. inform A. math B. hurry up C. guide D. set the table A. library card B. their C. asleep D. rob A. hometown B. have a headache C. ask D. clone A. gas B. card C. burrow D. incumbent A. idea B. Colombia C. rent D. the United States