【2013重庆】Ⅵ．完成句子。(每空1分，共8分)
根据所给提示，完成句子。每空一词，含缩略词。
69．The students of Class Three have cleaned their classroom(改为否定句)
The students of Class Three______ ________ their classroom.
70．She often has dinner at half six in the evening．(对划线部分提问)
_______ __________does she often have dinner in the evening?
71．I feel like going for a walk this afternoon.(改为同义句)
I ________ _________go for a walk this afternoon．
