按要求改写句子，每条横线只填一个单词。

1. The children like the ball. (改为一般疑问句)

     ____________ the children ____________ the ball?

2. Are these your pens? (同义句转换)

    Are these ____________ ____________?

3. They get up at six thirty. (对画线部分提问)

    When ____________ they get up?

作业完，拆卸液枪时，应（）。

A、直接拆卸

B、先关掉截止阀再拆卸

C、将枪管压在顶板上后拆卸