A. gradual B. adapt to C. pollution D. east A. century B. difficult C. Guests do not go in D. zebra A. giraffe B. primary C. omit D. jet A. dawdle B. bedroom C. verse D. acre A. damp B. canteen C. president D. magnesium A. build up B. cheque C. lake D. skate A. village B. black rhino C. digestive D. upstairs A. town B. teens C. think over D. junior college A. recommend B. uncrumpled C. clear D. bathroom A. office worker B. section C. black D. store