A. English B. savannah C. own D. ecosystem A. obstruction B. lose face C. publish D. listen and do A. lizard B. art C. billion D. umbrella A. vary from to B. tower bridge C. consist D. play A. play and act B. bison C. kindness D. laundry A. lesson B. pupil C. news shows D. rubber A. drama B. lightning C. camp D. aware A. atlas B. intermittent C. sing D. frightening A. on vacation B. science C. tiring D. freeway A. ceremony B. shall C. maths D. ceiling