读一读，按要求变一变，填一填。

1. I watched TV yesterday. (对画线部分提问)

    _______ _______ you _______ yesterday?

2. Are they going to play basketball with us? (写出答语)

    Yes, _______ _______.

3. The men wore women's clothes. (改为否定句)

    The men _______ _______ women's clothes.

4. We are going to visit Beijing in two weeks. (改为否定句)

    _________________________________

5. We can listen to them in the evenings. (对画线部分提问)

    ________ can you ________ to them?

两点电荷间距离为r时，相互作用力为F，当距离变为r/2时，它们之间相互作用力为_______F，为使作用力仍为F，则两点电荷的电量可同时为原来的______倍。