A. food for thought B. often C. spaceman D. congratulation A. traveller B. index C. category D. document A. cinema B. skate C. keyboard D. strong-minded A. hang on B. learn C. plum D. make a fire A. keen B. clothes C. employee D. staple A. click B. T-shirt C. tower D. Antarctic A. search B. glance C. bet D. nickname A. drink B. popsicle C. hesitate D. visit A. propulsion B. woollen C. information D. table A. use B. preserve C. shelf D. over there