A. permission B. face to face C. mouse D. physiological A. curtsy B. reader C. come up with D. invention A. search B. competitor C. process D. arrive in A. defence B. aerial C. absolute D. universal A. aside B. wear glasses C. teenager D. military A. sideways B. command C. slippery D. breakthrough A. fantastic B. concise C. nor D. back and forth A. ahead of B. worldwide C. remain D. amusement park A. in search of B. concert C. the Antarctic D. compared with A. sheet B. game C. agriculture D. add