A. perception B. practice C. coat D. manifest A. psychology B. vegetable C. moot D. proposition A. masterpiece B. radio astronomer C. blackberry D. ambition A. horizon B. gravy C. megacycle D. concentrate A. hurriedly B. different C. nebula D. amusement A. pester B. ahead of C. rational D. thinker A. single B. tiger C. listen to English D. encounter A. headlight B. element C. supernatural D. hardly A. fall over B. circle C. alcohol D. hydrogen A. controversial B. emission C. trousers D. pile