根据所给要求，改写下列句子。每空格限填一词。 1. The new flat cost Mr. Black a lot of money. (改为否定句) The new flat ______ cost Mr. Black ______ money. 2. The red bike belongs to my mother. (对划线部分提问) ______ ______ belongs to your mother? 3. Whiz-kid Wendy's never late for work.（改为反意疑问句） Whiz-kid Wendy's never late for work, _____ _____? 4. The boy is so strong that he can carry the heavy safe easily. (改为简单句) The boy is strong ______ ______ carry the heavy safe easily. 5. By the time he was six, he had started learning Japanese. (保持句子原意) He ______ learning Japanese ______ he was six. 6. James Nai. Smith, a Canadian doctor invented basketball. (改为被动语态) Basketball ______ ______ by James Nai. Smith, a Canadian doctor.