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he kitchen. A. can B. can39。t C. could D. couldn39。t ( )4. When Carl ______ at home, he doesn39。t cook without a parent. A. was B. be C. is D. are ( )5. We ________ put clothes on lamps or heaters. A. should B. can C. mustn39。t D. must ( )6. A fire can happen _______ you39。re sleeping at home. A. where B. when C. who D. why ( )7. It was ______ ten o39。clock when I heard a loud noise. A. about B. above C. after D. before ( )8. When I looked out of the window, I ____ smoke. A. see B. sees C. seeing D. saw ( )9. The firemen know _____ to do. A. what B. why C. how D. when ( )10. Most fires start in the ________. A. bedroom B. bathroom C. kitchen D.