1. They can sing. (用dance 将句子变成选择疑问句)
    ________ they sing ________ dance?
2. What's your age? (改为同义句)
    ________ ________ are you?
3. You can come here again. (改为祈使句)
    ________ ________ again, please.
4. Can Kate draw a picture? (作肯定回答)
    ________, ________ ________.
5. We can play ping-pong. (改为否定句)
    We ________ ________ ping-pong.