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__all night. burn B. burn C. burning D. burned Multiple choice: flowers ______sweet in the botanic garden attract the visitors to the beauty of name. A. to smell B. smelling C. smelt D. to be smelt 4. The old man, ______abroad for twenty years, is on the way back to his motherland. A. to work B. working C. to have worked D. having worked 5. He looked around and caught a man _____ his hand into the pocket into a passenger. A. put B. to be putting C. to put D. putting 6. A cook will be immediately fired if he is found ______ in the kitchen. B. smoking . to smoke D. smoked Exercise A: Finish Part A on P29 Keys: 2. relaxing 3. tirin