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. Oh, I fot _____ A. to be turning it off B. turn it off C. to turn it off D. to have turned it off (6). Most houses seems ______ destroyed by the storm when we ar rived there. 二、 to be B. to C. to have been D. being (7) We were told not ______ the house at night. A. to leave B. leaving C. to be leaving D. left Ⅲ . Rewrite the sentences using infinitive str uctures. 1. I’m traveling during a sandstorm. It’s dangerous ______________________________________________ 2. Experts hope that they will lea rn more about the movement of thunderstorms. Experts hope ________________________________________________ 3. The man need to plete the work on th