句型变化。

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.

在空间直角坐标系中，点P（1，3，-5）关于平面xOy对称的点的坐标是[ ]

A.（-1，3，-5）

B.（1，-3，-5）

C.（1，3，5）

D.（-1，-3，5）