题目

On my way ____ home, I lost a ticket ____ Titanic.             A. to; to                   B. to; of                     C. /; of                         D. /; to 答案：DRewrite the sentences as required（按照要求改写句子）： We use a breathing equipment to protect firemen from smoke.（改为同义句） A breathing equipment is ________ ________ ________ firemen from smoke.