1. Play outside, please. (改为否定句) 
    _____ _____ outside, please.
2. The twins are of medium height. (对划线部分提问)
    _____ _____ the twins look like?
3. They kept talking until the teacher came in. (改为同义句) 
    They didn't _____ _____ until the teacher came in.
4. Ms. Black exercises more than before. (改为反意疑问句)
    Ms. Black exercises more than before, _____ _____?
5.在我孤独的时候我的宠物狗总使我的生活充满了乐趣。(完成译句)
    My pet dog always _____ my life _____ great pleasure when I am alone.