A. senior B. empty C. traffic police D. assumption A. defend B. pneumatic C. carrier D. trousers A. receptionist B. rubbish bin C. shut D. footstep A. league B. vertebrate C. garbage D. turn on A. else B. collect C. sweep D. build sb up A. newborn B. must C. figure D. hen A. upside B. dust C. compulsory D. impersonal A. untidy B. Southampton C. pretentious D. generate A. astronomer B. ancient C. citizen D. put A. bedroom B. outgoing C. nostril D. organism